A student recommends megavoltage photons rather than electrons for a very superficial target because photons provide more skin sparing. Why is that reasoning incomplete?

A patient is simulated for a small head-and-neck target. The display field of view is decreased while the reconstruction matrix remains 512 × 512. Which effect is MOST likely?

A radiation therapist identifies an inconsistency between the simulation order and the proposed patient position. Which action falls within the therapist’s professional responsibility?

A therapist obtains CT simulation images that will later be used to create digitally reconstructed radiographs for treatment verification. Which characteristic of the CT dataset is MOST important for producing accurate DRRs?

Which clinical clue MOST strongly distinguishes TBI from localized external-beam techniques?

Which change would MOST likely convert a classic SRS scenario into an SBRT scenario?

Which treatment description should prompt the therapist to think FIRST of proton therapy?

After contrast-enhanced CT simulation, a student argues that the enhancing edge of a tumor automatically defines the complete treatment volume. Which response is BEST?

A patient scheduled for IV contrast-enhanced CT simulation has a history suggesting impaired kidney function. Which action is BEST before contrast administration?

A patient is undergoing CT simulation for a small spinal lesion. The therapist decreases reconstructed slice thickness while maintaining the other acquisition parameters. Which combination of effects is MOST likely?