CAMRT 2025 EXAM QUESTIONS WITH COMPLETE SOLUTION

CAMRT 2025 EXAM QUESTIONS WITH COMPLETE SOLUTION 100 Rad = _____ Gray - ANSWER-1 Gy .100 REM = __________ Sv - ANSWER-1 Sv .1mCi = ? Bq - ANSWER-37MBq .Accumulated activity calculation - ANSWER-Acum=Ao 1.44Te .barrel and pincushin artifact - ANSWER-gamma ray locations bowed away from spaces between PMTs and toward the PMTs themselves. Seen when linearity map is turned off .calculate percent of original intensity - ANSWER-100%/2^n where n is the number of HVLs .Causes for worsening of energy resolution of well counter or probe - ANSWER-cracked crystal (unlikely) Uncoupling of crystal Crystal hydration .Class A radionuclides - ANSWER-Alpha emitters and their daughters .Class B radionuclides - ANSWER-Relatively long lived gamma emitters and some betas 131-I, Ga-67, 58-Co .Class C radionuclides - ANSWER-Short-lived Gamma and beta emitters Tc, the other iodines, Tl, Y90, P32 .DC accuracy - ANSWER-does the DC accurately measure the amount of activity (+/- 10%) .DC Constancy - ANSWER-do todays readings fall within an acceptable range compared to prior readings (+/- 10%) Done daily .effect of lithium on thyroid - ANSWER-results in decreased T4 and T3 results in enlarged thyroid Therefore increases I uptake .Effective half life equation - ANSWER-1/Te= 1/Tb + 1/Tp .Energy or spatial resolution equation - ANSWER-high value-low value at half peak/energy or channel .Exposure Rate Equation - ANSWER-Exposure Rate = Activity x Exposure Rate Constant x 1/d^2 units are cm^2mR/mCihr .Frequency of DC accuracy - ANSWER-Annualy .Frequency of DC constancy - ANSWER-daily .Frequency of DC linearity - ANSWER-quarterly .Frequency of Gamma Camera collimator damage check - ANSWER-annually