Is it beneficial to use fiducial markers if you are using daily cone-beam CT for prostate localization?

The answer to this question will be self-evident if one ever tries to align the prostate to the CBCT at the linac console. It's tough enough to contour the prostate on a planning CT, and the inferior quality of CBCT images only makes it harder to know where the base or apex are. This latter point ca...

IGRT questions are, to me, the most mathematically interesting questions in radiation oncology and relatively understudied. They involve things like systematic error, random error, spatial calculations, mathematical "margin recipes," etc.

Let's perform what Einstein called a gedankenexperiment. We a...

I agree with @Dr. First Last. I try to use fiducial markers for all prostate patients. For those few patients who refuse, typically those who have had a bad experience with a biopsy, I use CBCT but have less confidence in the alignment. I don't have experience placing fiducials myself, but instead h...