Which of the following cannot be directly influenced by x-ray personnel during day-to-day use of x-ray equipment?

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

Answer: (D)

In day-to-day x-ray work you have direct influence over how the exam is performed: you choose exposure factors, position and collimate the patient, use shielding, and instruct the patient to minimize motion. Things you cannot directly influence at the console are the fixed characteristics of the equipment and the policies that govern its use—elements built into the machine, its design, and the facility’s maintenance and safety standards. If the items referenced reflect those fixed, non-changeable aspects, then none of them can be directly altered during routine imaging, making the option that includes all three the best choice.