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RADT465

ARRT review covering Radiation Protecction

QuestionAnswer
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 )
Created by: kkaljadani