The function of the focusing cup is to aim the x-ray beam at the film in the patient's mouth and thereby minimize the amount of radiation to the patient's face.

Question

Quizplus · Accepted Answer

The focusing cup's function is to narrow the electron beam in an X-ray tube, directing the electrons towards the anode target to produce X-rays efficiently, not to aim the X-ray beam at the film or minimize radiation to the patient's face.

The Function of the Focusing Cup Is to Aim the X-Ray