Question

Concerning the exposure index in computed radiography:

a. The exposure index is a measure of the dose incident on the image plate

b. The exposure index varies among different manufacturers

c. Doubling the dose doubles the resulting exposure index

d. Knowledge of typical exposure indices can help identify over exposures

e. The exposure index depends solely on the dose given

Answer 1

a. True. 

b. True. 

c. False. Different manufacturers of computed radiography systems will have different formulas for calculating the exposure index, and the relationship is not linear.

d. True. 

e. False. It is also related to the X-ray beam energy including filtration, the degree of scatter and the nature of the examination performed.