RADIATION DOSIMETRY FINAL EXAM QUESTIONS AND CORRECT ANSWERS

RADIATION DOSIMETRY FINAL EXAM
QUESTIONS AND CORRECT ANSWERS
How much do extra images add to the patient's radiation dose from the examination? -
CORRECT ANSWERS approximately 10%



What can cause multiple scan average doses (MSAD) to increase? - CORRECT
ANSWERS overlapping slices



What is the most useful tool for comparing radiation doses among different protocols? -
CORRECT ANSWERS CTDIvol



In conventional film-screen radiography, how much of the radiation does the skin of the
entrance plane receive? - CORRECT ANSWERS 100%



How does filtration affect the radiation dose? - CORRECT ANSWERS by removing some of
the soft x-rays



How many cGy are equivalent to 1 radiation absorbed dose (rad)? - CORRECT ANSWERS 1



How many times greater is radiation exposure from a whole body CT scan than from a chest x-
ray? - CORRECT ANSWERS 100 times greater



What is not a strategy for reducing CT radiation dose? - CORRECT ANSWERS maximize the
use of thin slices



What are some strategies for reducing CT radiation dose? - CORRECT ANSWERS limiting
the region covered, considering alternative modalities, or patient shielding