Question

Which of the following are correct regarding dose–length product (DLP), patient dose and conversion coefficient?

a. The absorbed dose can be derived from DLP

b. The conversion coefficient depends on the body region

c. The conversion coefficient is E (effective dose) x DLP

d. A high tissue weighting factor reduces the conversion coefficient

e. The scanner design affects the conversion coefficient

Answer 1

a. False. The effective dose can be derived from DLP.

b. True. The conversion coefficient depends on the body region and scanner design.

c. False. Conversion coefficient = E/DLP.

d. False. A high tissue weighting factor increases the conversion coefficient: it is higher in the abdomen than in the chest and lowest in the head.

e. True.