When using automatic collimation, collimating to the anatomy of interest is an unnecessary waste of time; the beam is already collimated.

Question

Quizplus · Accepted Answer

Automatic collimation adjusts the x-ray beam size to the detector size, not specifically to the anatomy of interest. Manual adjustment may still be necessary to optimize the field size to the area being examined, reducing patient exposure and improving image quality.

When Using Automatic Collimation, Collimating to the Anatomy of Interest