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1- what percentage of public exposure to ionizing radiation is from medical sources?
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2- which of the following cell type has the greatest radio sensitivity in adult human?
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RADT465
ARRT review covering Radiation Protecction
| Question | Answer |
|---|---|
| 1- what percentage of public exposure to ionizing radiation is from medical sources? | 50%(lange Q&.p 125 ) |
| 2- which of the following cell type has the greatest radio sensitivity in adult human? | Lymphocytes(lange Q&.p 125 ) |
| 3- the interaction between ionizing radiation and the target molecule that is most likely to occur is the ? | Indirect(lange Q&.p126 ) |
| 4- the unit used to express kinetic energy released in matter is the ? | Kerma(lange Q&.p126 ) |
| 5- which acute radiation syndrome require the largest exposure before the associated effects become apparent? | Central nervous system CNS(lange Q&.p126) |
| 6- what is the established annual occupational dose equivalent limit for the lens of the eye? | 150 mSv(lange Q&.p126 ) |
| 7- occupational radiation monitoring is required when it is possible that the individual might receive more than ? | One-tenth the annual dose limit(lange Q&.p126 ) |
| 8- a thermoluminescent dosimetry system would use which of the crystals? | Lithium fluoride(lange Q&.p 127 ) |
| 9- an increase in total filtration of the X-ray beam will increase? | Beam HVL(lange Q&.p128 ) |
| 10- in radiation protection the product of absorbed dose, tissue weighting factor and radiation weighting factor is used determine? | EfD (lange Q&.p128 ) |
| 11- what is the term used to describe X-ray photon interaction with matter and transference of part of the photons energy to matter? | Scattering(lange Q&.p129 ) |
| 12- the most radio sensitive portion of the GI tract is the ? | Small bowel(lange Q&.p 129 ) |
| 13- any wall that the useful X-ray beam can be directed toward is called ? | Primary barrier(lange Q&.p129 ) |
| 14- the annual dose limit for occupationally exposed individuals is valid for ? | Beta, x-, and gamma radiation(lange Q&.p129 ) |
| 15- patient dose increase as fluoroscopic? | FOV decrease(lange Q&.p130 ) |
| 16- the skin response to radiation exposure that appears as hair loss is known as ? | Epilation(lange Q&.p130 ) |
| 17- what unit of measures is used to express ionizing radiation dose to biological material? | Rem (SV)(lange Q&.p 130 ) |
| 18- the reduction in the intensity of an X-ray beam as it passes through material is termed? | Attenuation(lange Q&.p130 ) |
| 19- which type of dose response relationship represents radiation induced leukemia and genetic effects? | Linear- non threshold (lange Q&.p 131 ) |
| 20- for radiographic examinations of the skull it is generally preferred that the skull be examined in the ? | PA projection(lange Q&.p132 ) |
| 21- which of contributors most to occupational exposure? P | Compton scatter(lange Q&.p132 ) |
| 22- primary radiation barriers usually require which thickness of shielding? | 1/16 inch lead(lange Q&.p132 ) |
| 23- the NCRP recommend an annual effective occupational dose equivalent limit of ? | 5 rem ( 50 mSv)(lange Q&.p 133 ) |
| 24- aluminum filtration has its greatest effect on ? | Low energy X-ray photons(lange Q&.p 133 ) |
| 25- how will X-ray photon intensity be affected if the source to image distance (SID) is doubled? | Its intensity decrease four times(lange Q&.p133 ) |
| 26- the amount of time that X-ray are being produced and directed toward a particular wall is referred to as the ? | Use factor(lange Q&.p134 ) |
| 27- which of the following terms is correctly used to describe X-ray beam quality? | HVL(lange Q&.p 134 ) |
| 28- according to the NCRP the annual occupational whole body dose equivalent limit is ? | 50 mSv(lange Q&.p135 ) |
| 29- the automatic exposure device that is located immediately under the X-ray table is the ? | Ionization chamber(lange Q&.p135 ) |
| 30- which would most likely result in the greatest skin dose? | Short SID(lange Q&.p 136 ) |
| 31- which radiation induced condition is most likely to have the longest latent period? | Leukemia (lange Q&.p136 ) |
| 32- which of the ionizing radiation is described as having an RBE of 1.0? | Diagnostic X-ray(lange Q&.p 137 ) |
| 33- an optically stimulated luminescence dosimeter contains which detectors? | Aluminum oxide(lange Q&.p 137 ) |
| 34- filters used in radiographic X-ray tubes generally are composed of ? | Aluminum(lange Q&.p 137 ) |
| 35- which is often used to express exposure in air ? | Rad (Gy)(lange Q&.p137 ) |
| 36- primary radiation barriers must be at least how heigh ? | 7 ft(lange Q&.p 137 ) |
| 37- which projection would deliver the largest thyroid dose ? | AP skull(lange Q&.p137 ) |
| 38- how much protection is provided from a 100 KVp X-ray beam when using a 0.50 mm lead equivalent apron? | 75%(lange Q&.p 138 ) |
| 39- biologic material is least sensitive to irradiation under which conditions? | Anoxic(lange Q&.p138 ) |
| 40- which cells are most radio sensitive? | Erythroblasts(lange Q&.p138 ) |
| 41- the classification of acute radiation syndrome not include ? | Neonatal(lange Q&.p139 ) |
| 42- which of the contributes most to patient dose? | The photoelectric effect(lange Q&.p139 ) |
| 43- which interaction between ionizing radiation and the target molecule involves formation of a free radical ? | Indirect effects(lange Q&.p140 ) |
| 44- the single most important scattering object in both radiography and fluoroscopy is the ? | Patient(lange Q&.p140 ) |
| 45- a student radiographer who under 18 years of age must not receive an annual occupational dose of greater than ? | 0.1 rem (1 mSv)(lange Q&.p 140 ) |
| 46- the dose of radiation that will cause a noticeable skin reaction is referred to as the ? | SED(lange Q&.p 141) |
| 47- the primary function of filtration is to reduce ? | Patient skin dose (lange Q&.p141 ) |
| 48- which terms refers to the period between conception and birth? | Gestation(lange Q&.p142 ) |
| 49- in which type of monitoring device do photons release electrons by their interaction with air ? | Pocket dosimeter(lange Q&.p142 ) |
| 50- lead aprons are worn during fluoroscopy to protect the radiographer from exposure to radiation from? | Compton scatter(lange Q&.p144 ) |
| 51- radiation that passes through the tube housing in direction other than that of the useful beam is termed? | Leakage(lange Q&.p144 ) |
| 52- which of the types of radiation is (are) considered electromagnetic? | X-ray and gamma(lange Q&.p145 ) |
| 53- the target theory applies to ? | DNA molecules (lange Q&.p146 ) |
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kkaljadani
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