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(T/F) Oxygenated tissue is more sensitive to radiation.
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(T/F) Stochastic/probabilistic effects are threshold dependent and increase in severity as the dose increase.
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RADT 465 - Rad Prot

ARRT registry review covering radiation protection

QuestionAnswer
(T/F) Oxygenated tissue is more sensitive to radiation. True (Lange Q&A, 10th ed, Pg. 148)
(T/F) Stochastic/probabilistic effects are threshold dependent and increase in severity as the dose increase. False, stochastic/probabilistic effects do not have a threshold dose and do not increase in severity as dose increases (Lange Q&A, 10th ed, Pg. 148)
Radiation from sources such as food, radioactive gas, and radioactive minerals are all considered this category of exposure. Natural Background/Environmental (Lange Q&A, 10th ed, Pg. 148)
What is the largest source of natural background radiation? Radon (Lange Q&A, 10th ed, Pg. 148)
What is the annual occupational whole body dose limit? 50 mSv or 5 rem (Lange Q&A, 10th ed, Pg. 148)
What is the occupational dose limit for a pregnant radiographer? 5 mSv or 0.5 rem (Lange Q&A, 10th ed, Pg. 148)
What is the annual occupational whole body dose for students under 18 years? 1 mSv or 0.1 rem (Lange Q&A, 10th ed, Pg. 148)
Which cells are the most radiosensitive? Lymphocytes (Lange Q&A, 10th ed, Pg. 149)
Which cells are the least radiosensitive? Nerve Cells (Lange Q&A, 10th ed, Pg. 149)
Do muscle cells have high radiosensitivity or low radiosensitivity? Low Radiosensitivity (Lange Q&A, 10th ed, Pg. 149)
Lithium fluoride crystals are found in this type of dosimeter. Thermoluminescent Dosimeters (TLDs) (Lange Q&A, 10th ed, Pg. 150)
Aluminum oxide crystals are found in this type of dosimeter. Optically Stimulated Luminescence (OSLs)(Lange Q&A, 10th ed, Pg. )
What are two other names for Compton scatter? Classic Scatter and Thompson Scatter (Lange Q&A, 10th ed, Pg. 151)
What is the formula for the inverse square law? (Intensity 1 / Intensity 2) = (Distance 2 Squared / Distance 1 Squared) (Lange Q&A, 10th ed, Pg. 151)
What is the Law of Bergonie and Tribondeau? Cells are more radiosensitive if they are immature/undifferentiated, highly mitotic/multiply quickly, and if they are young (the younger the cells the more sensitive). (Lange Q&A, 10th ed, Pg. 151)
What is considered secondary radiation? Leakage and Scatter Radiation (Lange Q&A, 10th ed, Pg. 151)
What does HVL mean? HVL or Half Value Layer refers to the thickness of a material that will decrease the intensity of a beam to half of its original value (Lange Q&A, 10th ed, Pg. 152)
What is the minimum thickness of lead in a lead apron? It must contain at least 0.25 mm Pb (Lange Q&A, 10th ed, Pg. )
(T/F) The control booth/area is considered to be a primary protective barrier. False, the control booth/area is not considered to be a primary protective barrier since the primary/useful beam should not be directed toward it. The control booth/area is considered a secondary barrier. (Lange Q&A, 10th ed, Pg. 154)
Radiation leakage from the tube housing should never exceed this amount. 100 mR/h at 1 m (Lange Q&A, 10th ed, Pg. 156)
What is the SI equivalent to Rem? The Sievert (Sv) (Lange Q&A, 10th ed, Pg. 159)
What is the SI equivalent to Rad? The Gray (Gy) (Lange Q&A, 10th ed, Pg. 159)
How long should the exposure controller cords be on mobile radiography units? The cord should allow a technologist to stand at least 6 feet away from the x-ray tube. (Lange Q&A, 10th ed, Pg. 163)
How thick should the lead be in a primary protection barrier? They should contain 1.5 mm or 1/16 inch of lead (Lange Q&A, 10th ed, Pg. 163)
Which cells are considered to be the most radiosensitive in the body? Lymphocytes (Lange Q&A, 10th ed, Pg. 174)
Created by: rmhale
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