1.

Regarding dose in CT: a. In a body CT, the maximum skin dose is higher than the weighted CTDI (CTDIw) b. CTDI is higher in a CT head than a CT body c. CTDI is the best indicator of dose to an individual patient d. The skin dose in CT is higher than in prolonged fluoroscopy e. CTDIvol is an approximation of the average skin dose

Answer»

a. True. 

b. True. CTDI: head CT > abdo-pelvis CT > chest CT. 

c. False. CTDI measures the dose efficiency. It is mainly for comparison between different models/protocols; it does not measure the dose for individual patients. 

d. False. Skin dose: prolonged fluoroscopy > CT > plain film. 

e. False.



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