Gonad dose variation across facilities is due to variation in exposure factors plus: 1) variation in collimation 2) improper film development techniques 3) failure to use gonad shielding

• A. 1 and 2
• B. 1 and 3
• C. 2 and 3
• D. 1, 2, and 3

Answer: (B)

Gonad dose variation across facilities is driven by how much radiation reaches the gonads, which depends on exposure factors plus two practical controls: how tightly the beam is collimated and whether gonad shielding is used. If collimation isn’t tight, the field includes more tissue and the gonads can receive a higher dose. Using gonad shielding reduces the dose to the gonads by absorbing part of the beam. Improper film development doesn’t change the amount of radiation delivered to the patient during the exposure; it affects image quality and processing, not the actual gonadal dose for a given exam. Therefore, variation in collimation plus shielding status best explains differences in gonadal dose.