Rad Pro Ch.1 – Flashcards

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as low as reasonably achievable (ALARA)
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Precept holding that occupational exposure of the radiographer and other occupationally exposed persons should be kept "as low as reasonably achievable." An ALARA program should also be established and maintained for patients. Radiation exposure should always be kept ALARA for all medical imaging procedures. It is also known as optimization.
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background equivalent radiation time (BERT)
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Method to compare the amount of radiation received from a radiologic procedure with natural background radiation received over a specified period of time such as days, weeks, months, or years.
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entrance skin exposure (ESE)
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X-ray exposure to the skin of the patient.
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millisievert (mSv)
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A subunit of a sievert equal to one one-thousandth of a sievert (1/1000 Sv).
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optimization for radiation protection (ORP)
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Synonymous with ALARA. The concept of keeping radiation doses as low as reasonably achievable.
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sievert (Sv)
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The SI unit of measure for the radiation quantities, equivalent dose (EqD and effective dose (EfD).
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Tools for Radiation Awareness and Community Education (TRACE Program)
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In 2010 Toshiba American Medical Systems began a program to encourage hospitals to create a radiation dose awareness and dose reduction program for patients through the process of education for these individuals, for the community, for health care workers employed in the medical imaging profession, and for physicians.
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ionizing radiation
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Radiation that produces posi- tively and negatively charged particles (ions)
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radiation protection
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effective measures employed by radiation workers to safeguard patients, personnel, and the general public from unnecessary exposure to ionizing radiation
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biologic effects
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damage to living tissue of animals and humans exposed to radiation
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diagnostic efficacy
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degree to which the diagnostic study accurately reveals the presence or absence of disease in the patient
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occupational and nonoccupational doses
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the radiation dose that the worker and the patient receive
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Risk
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In general terms, the probability of injury, ailment, or death resulting from an activity. In the medical industry with reference to the radiation sciences, risk is the possibility of inducing a radiogenic cancer or genetic defect after irradiation.
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standardized dose reporting
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A system of stan- dardizing a patient's radiation dose by having the dose dictated into the patient's report and then tracking this dose.
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introduction and implementation of this program in a medical imaging department can lead to greater radiation safety through patient and community education.
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TRACE Program
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One of the three basic principles of radiation protection.
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shielding
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Something that should be provided for patients to facilitate understanding regarding a needed x-ray procedure.
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education
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Positively and negatively charged particles.
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Ions
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SI unit of measure for the radiation quantity, "Equivalent Dose".
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Sievert
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Type of communication that the radiographer should have with patients.
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Effective
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Radiation exposure received by a radiographer, during the fulfillment of duties.
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Occupational
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Radiation exposure that does not benefit a person in terms of diagnostic information obtained for the clinical management of medical needs or any radiation exposure that does not enhance the quality of the study.
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unnecessary
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Something that is a vital part of radiation protection in the healing arts.
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Efficacy
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Type of tissue that x-rays can injure.
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Biologic
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Energy that only humans can control.
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Radiant
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Most effective tool for early diagnosis of breast cancer.
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mammography
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Systems of something that has been constructed to uniquely quantify concepts of length, force, energy, and time.
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units
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Form of ionizing radiation.
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X-rays
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What "benefit" versus.
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Risk
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Method that compares the amount of radiation received, during an examination, with natural back-ground radiation over a specified period of time.
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BERT
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Something patients can become, when they are included in decisions concerning their own radiologic care.
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Empowered
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When radiation is used for patient examinations, both employers of radiation workers and the workers themselves have a responsibility for this in the medical industry.
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Safety
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Ionizing radiation has a beneficial potential but it can also have another potential.
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Destructive
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Physician who carried the responsibility for determining the medical necessity of a radiation procedure for the patient.
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Referring
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Type of dose reporting that can lead to a reduction in radiation dose for the patient.
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Standardized
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X-ray examinations that become necessary because of technical errors or carelessness.
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Repeats
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Diagnostic imaging personnel have this type of responsibility to ensure radiation safety, during all medical radiation procedures.
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Ongoing
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Radiation protection guidelines are rooted in this philosophy.
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ALARA
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Referring to radiation, what EqD is.
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Quantity
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Effective measures employed by radiation workers to safeguard patients, personnel, and the general public from unnecessary exposure to ionizing radiation
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radiation protection
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The degree to which the diagnostic study accurately reveals the presence or absence of disease in a patient.
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diagnostic efficacy
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A subunit of the sievert equal to 1/1000 of a sievert
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Millisievert (mSv)
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Damage to living tissue of animals and humans exposed to radiation
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biologic effects
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Makes patients feel that they are active participants in their own health care
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appropriate and effective communication
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In the medical industry with reference to the radiation sciences the possibility of inducing a radiogenic cancer or genetic defect after irradiation
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risk
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A disease process that does not have a fixed threshold
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radiation-induced cancer
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The benefit to the referring physician in having direct access to a patient's radiation dose history being the option of knowing whether or not the ordering of an additional radiologic procedure is advisable
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standardized dose reporting
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Individual in a hospital setting expressly charged by the administration to be directly responsible for the execution, enforcement, and maintenance of the ALARA program.
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radiation safety officer (RSO)
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SI unit of measure for the radiation quantity, "equivalent dose"
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Sv
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Method for comparing the amount of radiation received from a radiologic procedure with natural background radiation received over a specified period of time such as days, weeks, months, or years.
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BERT
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Produces positively and negatively charged particles (ions) when passing through matter
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Ionizing radiation
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The upper boundary doses of ionizing radiation for which there is a negligible risk of bodily injury or genetic defect
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Maximum allowable levels of radiation exposure
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Year in which x-ray was discovered
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1895
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Entrance skin exposure; surface of the skin where x-radiation enters the patient's body, resulting in an area of maximum exposure
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ESE
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acronym for as low as reasonably achievable
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ALARA
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responsibility of facilities that provide imaging serviced
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ensuring the highest quality of service
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a consequence of ionization in human cells
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production of free radicals
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based of evidence of harmful biologic effects
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need to safeguard against significant and continuing radiation exposure
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fear of being exposed to radiation
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radiation phobia
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Have the responsibility to select technical exposure factors that significantly reduce radiation exposure to patients and themselves
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radiologic technologists
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Radiation exposure received by persons not employed in the medical imaging profession (e.g. patients, the general public)
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nonoccupational doses
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Consists of two phases: (1) formulation new policies and procedures to promote radiation safety and the implementation of patient and community education and (2) technologic enhancements
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TRACE Program
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One of the three basic principles of radiation protection
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Distance
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Term that is synonymous with the acronym ALARA
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Optimization for radiation protection
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What would increase radiation exposure for both the patient and the radiographer?
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Repeated radiographic exposures as a result of technical error or carelessness
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To implement an effective radiation safety program in a facility that provides imaging services, the employer must provide all of the following:
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- an appropriate environment in which to execute an ALARA program and the necessary recourses to support the program - a written policy that describes the ALARA program ad identifies management's commitment to keeping all radiation exposure as low as reasonably achievable - periodic exposure audits to determine ways to lower radiation exposure in the workplace
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Radiation has been present on earth since:
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its beginning
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Occupational and nonoccupational doses will remain well below maximum allowable levels when:
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Radiographers and radiologists keep exposure as low as reasonable achievable
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How can humans safely control the use of radiant energy? 1. By using knowledge of radiation-induced hazards that have been gained over many years 2. By employing effective methods to limit or eliminate radiation-induced hazards 3. By completely eliminating the use of radiation in the healing arts
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1 and 2 only
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In medicine, when radiation safety principles are correctly applied during imaging procedures, the energy deposited in living tissue be the radiation can be limited. This results in:
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reducing the potential for adverse effects
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To reduce radiation exposure to the patient: 1. Reduce the amount of the x-ray "beam on" time 2. Utilize as much distance as warranted between the x-ray tube and the patient for the examination 3. shield the patient with appropriate gonadal and/or specific area shielding devices
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1,2,and 3
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During a routine radiologic examination, when radiographers use their intelligence and knowledge to answer patient questions about the risk of radiation exposure honestly, they can do mud to allocate any patient: 1. Apprehension 2. Confidence 3. Fears
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1 and 3 only
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During phase one of the TRACE Program, after new and more definitive radiation safety policies and procedures have been written, some ways of providing patient and community education are through the use of: 1. Informational posters placed strategically through-out the health care facility 2. Brochures that describe imaging procedures in simple terms 3. Basic information on a specific website designed for patient education
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1,2,and3
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Certain individual radiologic procedures need to have patient dose dictated into every radiologic report. These procedures include: 1. Computed tomography 2. General fluoroscopy 3. Interventional procedures
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1,2, and 3
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Effective radiation protection measures take into consideration: 1. Both human and environmental physical determinants 2. Technical elements 3. Procedural factors
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1,2, and 3
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When illness or injury occur or when a specific imaging procedure for health screening purposes is prudent, a patient may:
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Elect to assume the relatively small risk of exposure to ionizing radiation to obtain essential diagnostic information
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Any radiation exposure that does not benefit a person in terms of diagnostic information obtained for the clinical management of medical needs or that does not enhance the quality of a radiologic examination is called:
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Unnecessary radiation
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The ALARA philosophy should: 1. Be a main part of every health care facility's personnel radiation control program 2. Be established and maintained because here are no established dose limits for the amount of radiation that patients may receive for individual imaging procedures 3. Show that radiographers and radiologists in a facility have considered reasonable actions that will reduce patient and personnel dose below required limits
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1,2, and 3
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When an imaging procedure is justified in terms of medical necessity, diagnostic efficacy is achieved when optimal-quality images, revealing the presence or absence of disease, are obtained with:
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Minimal radiation exposure
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For the welfare of patients and the workers, facilities providing imaging services must have:
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An effective radiation safety program
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When radiation is safely and prudently used in the imaging of patients, the benefit of the exposure can be ________ while the potential risk of biologic damage is_______.
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Maximized, Minimized
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Which of the following basic principles of radiation protection can be applied to both the patient and the radiographer? 1. Time 2. Distance 3. Shielding
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1,2,and 3
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Which of the following recommended the use of Background Equivalent Radiation Time for improving patient understanding and reducing fear and anxiety associated with having an x-ray procedure?
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National Council on Radiation Protection and Measurements
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BERT is a:
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Method of comparison
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The end of result of the TRACE Program is:
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A reduction in patient dose
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Typically, people are more likely to accept a risk if they perceive that:
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The potential benefit to be obtained is greater than the risk involved
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The most effective tool(s) for diagnosing breast cancer continue(s) to be:
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Mammography
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The millisievert (mSv), a subunit of the sievert (Sv), is equal to:
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1/1000 of an Sv
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Repetition of a radiographic exposure because of poor patient positioning results in:
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An increase in total radiation exposure to the patient and the radiographer
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T/F X-rays are a form of non ionizing radiation
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F
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T/F The sievert (Sv) is the SI unit of EqD
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T
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T/F The ability of x-rays to cause injury in normal biologic tissue just became apparent recently.
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F
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T/F A threshold exists for radiation-induced malignant disease
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F
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T/F BERT is based on an annual U.S. population exposure of approximately 1 mSv per year
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F
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T/F Diagnostic efficacy provides the basis for determining whether an imaging procure or practice is justified.
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T
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T/F The basic principles of time, distance, and shielding can be applied for the safety of both the patient and the radiographer
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T
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T/F Human-made radiation is more dangerous than an equal amount of natural radiation
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F
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T/F Humans are not continuously exposed to sources of ionizing radiation
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F
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T/F BERT is a method of explaining radiation to the public
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T
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T/F Radiologic technologists and radiologists are educated in the safe operation of radiation-producing imaging equipment
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T
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T/F After ordering and x-ray examination or procedure, the referring physician must accept basic responsibility for protecting the patient from non-useful radiation exposure.
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T
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T/F It is the responsibility of the referring physician to provide the necessary resources and appropriate environment in which to execute an ALARA program in a health care facility
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F
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T/F A health care facility must have a written policy statement describing the Radiation Safety Program. The statement must also identify the commitment of management to keep all radiation exposure ALARA and must be available to all employees in the workplace.
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T
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T/F In general terms, risk can be defined as the probability of injury, ailment, or death resulting from an activity.
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T
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T/F BERT implies risk from radiation exposure
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F
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T/F There is a need for each radiation-producing modality to record patient radiation dose.
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T
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T/F TRACE stands for Tools for Radiation Awareness and Community Education
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T
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T/F Production of high-energy x-ray photons is a consequence of ionization in human cells.
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F
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T/F Radiation produced from an x-ray tube in an example of controllable radiant energy
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T
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T/F Various methods of radiation protection may be applied to ensure safety for persons employed in radiation industries, including medicine, and for the population at large.
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T
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T/F If a radiographer makes an error in selecting technical radiographic exposure factors for a specific projection of an anatomic body part, the projection can be repeated without an increase in radiation dose for the patient and the radiographer
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F
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T/F Most patients are unaware that most of their background radiation comes from artificial radioactivity in their own body
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F
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T/F Diagnostic efficacy is not an important part of radiation protection in the healing arts
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F
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T/F When radiographers use their intelligence and knowledge to answer a patient's questions about the risk of radiation exposure honestly, they can do much to alleviate the patient;s apprehension and fears during a routine radiologic examination.
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T
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BERT emphasizes that radiation is an ______ part of our environment.
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innate
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Radiation exposure should always be kept at the ______ possible level for the general public.
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lowest
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Effective radiation protection consists of the tools and techniques primarily designed to ______ radiation exposure while producing _________ diagnostic images.
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minimize/optimal-quality
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When ionizing radiation is used to obtain a mammogram for the welfare of a patient, the directly realized _______ of the exposure to this radiant energy ______ ______ any slight ______ of inducing a radiogenic malignancy or any genetic defect.
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benefits/ far outweigh/ risk
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In medicine, when radiation safety principles are applied correctly during imaging procedures, the ______ deposited in living tissue be radiation can be limited, thereby reducing the potential for ______ ______.
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energy/ biologic effects
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Diagnostic efficacy is ______ when essential images are produced under recommended radiation protection guidelines.
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maximized
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The rationale for ______ comes from evidence compiled be scientists over the past century.
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ALARA
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Radiologic technologists and radiologists follow ______ procedures.
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established
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To use ______ as a basic principle for radiation, a radiographer can reduce the amount of x-ray "beam-on" time.
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time
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Patients not only should be made aware of what a specific procedure involves and what type of cooperation is required, but also must be informed of what needs to be done, if anything, as a ______ to their examination.
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Follow-up
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Radiologic technologists and radiologists are educated in the ______ operation of radiation-producing imaging equipment.
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Safe
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A radiographer should always shield the patient with appropriate _______ and/or ______ ______ shielding.
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gonadal/ specific area
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The ______ concept should serve as a guide for the selection of technical exposure factors.
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ALARA
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______ does not imply radiation risk; it is simply a means for comparison.
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BERT
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Optimal radiographic images should be obtained with the _______ exposure.
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first
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Radiologic technologists and radiologists use ______ devices whenever possible.
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Protective
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Management in a health care facility should perform a periodic exposure ______ to determine how radiation exposure in the workplace may be lowered.
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Audit
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______ understanding of biologic effects associated with diagnostic radiology was gained throughout the twentieth century.
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Greater
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The millisievert (mSv) is a ______ of the sievert (Sv).
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Subunit
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X-rays are a form of ______ radiation; therefore, their use in medicine for the detection of disease and injury requires ______ measures.
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ionizing/ protective
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Imaging facilities must have an effective radiation safety program that provides patient protection and patient ______.
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Education
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Ionizing radiation such as x-rays have both a ______ and a ______ potential.
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beneficial/ destructive
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Radiographers should select the _____ radiation exposure that produces useful radiographic images.
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smallest
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Creation of ______ atoms is a consequence of ionization in healthy tissue.
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Unstable
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Radiation workers are required to perform their ______ practices in a manner consistent with the ALARA principle.
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Occupational
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the parts of an x-ray tube
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glass envelope, target (anode +), high-speed electron stream, filament (cathode -), x-ray beam (electro-magnetic waves)
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Dental, intraoral EfD and BERT values
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EfD - 0.06 BERT - 1 wk
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Chest radiograph EfD and BERT values
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EfD - 0.08 BERT - 10 days
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Lumbar spine EfD and BERT values
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EfD - 3.0 BERT - 1yr
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Abdomen EfD and BERT values
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EfD - 0.7 BERT - 4 mo
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CT chest EfD and BERT values
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EfD - 8.0 BERT - 3.6 yr
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CT abdomen/pelvis EfD and BERT values
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EfD - 10.0 BERT - 4.5 yr
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T/F Healthy normal biologic tissue cannot be injured by ionizing radiation; therefore it is not necessary to protect humans against significant and continuous exposure
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False
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T/F Radiation protection is the responsibility of the radiographer.
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True
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Ionizing radiation is defined as:
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Radiation that produces positively and negatively charged particles (ions) when passing through matter
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Some consequences of ionization in human cells include: (1) Creation of unstable atoms (2) Production of free electrons (3) Creation of reactive free radicals capable of producing substances poisonous to the cell
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1,2, and 3
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Which of the following is a special form of radiation that is capable of creating electrically charged particles by removing orbital electrons from the atom of the material with which it interacts? A. Ultrasonic radiation B. Ionizing radiation C. Nonionizing radiation D. Subatomic Radiation
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Ionizing radiation
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T/F Ionizing radiation has both a beneficial and destructive potential.
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True
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Patients who have and understanding of the medical benefits of an imaging procedure because they received factual information about the study before having the examination are more likely to:
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Overcome any radiation phobia and be willing to assume a small risk of possible biologic damage
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T/F Diagnostic efficacy is achieved when the diagnostic study accurately reveals the presence or absence of disease in a patient
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True
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T/F The benefit of the exam should not outweigh the risk of exposure
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False
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What does ALARA stand for?
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as low as reasonably achievable
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Who is responsible for maintaining ALARA in the medical industry? A. Radiation technologists B. Employers C. Both A and B D. None of the above
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Both A and B
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What does TRACE stand for?
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Tools for Radiation Awareness and Community Education Program
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T/F Patient education is the responsibility of the radiographer.
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True
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What does BERT stand for?
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background equivalent radiation time
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Define diagnostic efficacy.
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The degree to which the diagnostic study accurately reveals the presence or absence of disease in the patient.
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Effective measures employed by radiation workers to safeguard patients, personnel, and the general public from unnecessary exposure to ionizing radiation define:
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Radiation protection
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What method can be used to answer patients' questions about the amount of radiation received from a radiographic procedure?
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BERT
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The term optimization for radiation protection (ORP) is synonymous with the term:
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As low as reasonably achievable (ALARA)
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Standardized dose reporting for radiologic procedures can lead to:
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A reduction in patient radiation dose
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What uses a two-phase program to create radiation awareness and community education?
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TRACE
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The degree to which the diagnostic study accurately reveals the presence or absence of disease in the patient defines which of the following terms?
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Diagnostic efficacy
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The millisievert (mSv) is equal to:
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1/1000 of a sievert
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An effective radiation safety program requires a firm commitment to radiation safety by: (1) Facilities providing imaging services (2) Radiation workers (3) Patients
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1 and 2 only
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If patients in the same location are receiving on average approximately the same entrance skin exposure (ESE) in every health care facility for a specific imaging procedure with the exception of one facility, in which higher-radiation ESEs and subsequent doses are being received for the same procedure, that institution would:
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No longer be in compliance with ALARA standards and would have to take the necessary action to bring the ESE values and subsequent doses back to a level that would comply with regulatory standards
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A patient may elect to assume the relatively small risk of exposure to ionizing radiation to obtain essential diagnostic medical information when: 1. illness occurs 2. injury occurs 3. a specific imaging procedure for health screening purposes is prudent
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1,2, and 3
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Which of the following is a method that can be used to answer patients' questions about the amount of radiation received from a radiographic procedure?
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BERT
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Which of the following is a two-phase program to create radiation awareness and community education?
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TRACE
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How can humans safely control the use of radiant energy?
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using the knowledge of radiation hazards that has been gained over many years and by employing effective methods to limit or eliminate those hazards
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How can radiologic technologists reduce radiation exposure to patients and to themselves?
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using protective devices whenever possible, by following established procedures, and by selecting technical exposure factors that significantly reduce radiation exposure
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As ionizing radiation passes through matter, what is the event that may cause injury in normal biologic tissue?
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ionizing radiation produces positively and negatively charged particles (ions). he production the these ions is the event that may cause injury in normal biologic tissue.
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What are the three basic principles of radiation protection?
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time, distance, and shielding
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How can imagining personnel apply the three cardinal principles of radiation protection to minimize occupational exposure?
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1. shortening the length of time spent in a room where x-radiation is being produced 2. standing at the greatest distance possible from an energized x-ray beam 3. interposing a radiation-absorbent shielding material between the radiographer and the source of radiation
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What principle can be used to compare the amount of radiation that various health care facilities in a particular area use for specific imaging procedures?
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The ALARA principle provides a method that can be used to compare the amount of radiation that various health care facilities in a particular area use for specific imaging procedures
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List three ways to providing education for imaging department staff when using the TRACE Program?
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1. providing in-service education on various radiation safety topics to accommodate individual needs of the staff 2. handing our a fact-to-remember sheet at the end of an in-service program 3. e-mails highlighting of the most important topics covered in a staff in-service program to imaging staff members to help reinforce and retain vital information
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Regarding the ALARA Program in a hospital setting, what are three responsibilities for the program that are entrusted to the Radiation Safety Officer by the Administration?
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In a hospital setting, the Radiation Safety Officer (RSO) is expressly charged by the administration to be directly responsible for the execution, enforcement, and maintenance of the ALARA Program
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How is risk weighed against benefit in medical radiography?
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When ionizing radiation is used for the welfare of the patient, the directly realized benefits of the exposure to this radiant energy must far outweigh any slight risk of inducing a radiogenic malignancy or any genetic defects
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If patients in a particular location receive on average approximately the same ESE for a specific imaging procedure, but one health care facility in that same area began giving its patients higher-radiation ESEs and subsequent doses, what would be the status of that facility, and what would be the expectation for it?
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The institution giving the higher-radiation ESEs and subsequent dose would no longer be in compliance with ALARA standards. This facility would have to take the necessary action to bring the ESE values and subsequent doses back to a level that would comply with regulatory standards
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List six consequences of ionization in human cells.
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1. creation of unstable atoms 2. production of free electrons 3. production of low-energy x-ray photons 4. creation of reactive free radicals capable of producing substances poisonous to the cell 5. creation of new biologic molecules detrimental to the living cell 6. injury to the cell that may manifest itself as abnormal function or loss of function
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If a patient is having a chest x-ray and the patient asks the radiographer "How much radiation will I receive from this x-ray?" how should the radiographer respond to the patient's question?
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The radiographer can respond by using an estimation based on the comparison o radiation received from the x-ray to natural background radiation received, for example, over a certain number of days. Thus the radiographer can reply, "The radiation received from having a chest x-ray is equivalent to what would be received while spending approximately 10 days in your natural surroundings."
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If a non radiologist physician is performing a fluoroscopic procedure and a specific dose has been reached, what should the radiographer assisting that physician do?
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The radiographer assisting the physician performing the fluoroscopic procedure can let the physician know that a specific dose has been reached so that the physician operating the fluoroscope will have the opportunity to decide to continue or stop the procedure.
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What is the benefit of standardized dose reporting to the referring physician?
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The physician has direct access to a patient's radiation dose history and has the ability to decide whether or not the ordering of an additional radiologic procedure is advisable
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List three advantages of using the BERT method to compare the amount of radiation received with the natural background radiation received over a given period.
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1. BERT does not imply radiation risk, but rather is simply a means of comparison 2. BERT emphasizes that radiation is an innate part of our environment 3. an answer given in terms of BERT is easy for the patient to comprehend
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What are the radiation workers' responsibilities to maintain an effective radiation safety program?
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1. be aware of riles governing the workplace 2. perform duties consistent with ALARA
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How does the Tools for Radiation Awareness and Community help patients and the community?
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To enhance understanding for using radiation safety and for enabling these people to more actively participate in their own magical decisions
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What are biologic effects?
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damage to living tissue of animals and humans exposed to radiation
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What is the intention behind the ALARA concept?
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keep radiation exposure and consequent dose to the lowest possible level
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What is the end result of the TRACE Program?
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reduction in patient dose
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