A patient is to be treated with a pelvic field on a linear accelerator.The patient is quite obese and the port films show that the field shifts superiorly and inferiorly on a daily basis.What bony landmark may measurements be taken from to stabilize this treatment portal?

Question

Quizplus · Accepted Answer

The iliac crest extends from the ASIS to the posterior superior iliac spine (PSIS).The ASIS is palpable, and measurements may be taken from it in the superoinferior or mediolateral direction.

A Patient Is to Be Treated with a Pelvic Field