Question

Which of the following are true about the quality and quantity of the X-ray beam?

a. The quality describes the number of photons in the X-ray beam

b. The quantity determines the penetrability of the X-ray beam

c. The quantity is inversely proportional to the tube current

d. The quantity is directly proportional to the tube voltage

e. The quantity is dependent on the choice of target material in the anode

Answer 1

a. False. This is the quantity.

b. False. X-ray beam penetrability is dependent on beam quality. An X-ray beam containing higher energy photons is more penetrating.

c. False. It is directly proportional.

d. False. In the range of tube voltages used in general radiography, it is approximately proportional to the square of peak kV (kVp).

e. True. The amount of Bremsstrahlung radiation produced in higher-atomic-number targets is greater.