In radiation therapy for prostate cancer, custom body molds—also known as immobilization devices—are used to ensure a patient's body is in the exact same position for each treatment. This precision is critical for targeting the radiation beams precisely at the tumor while minimizing exposure to surrounding healthy organs.

The Usually also put tattoos on the body to make sure it’s lined up properly. Did you ask about that when they discussed custom body molds?

I’ve had both IMRT and SBRT radiation. In both cases, they put permanent tattoos on my body. The tattoos are Almost invisible, They are dots you would be hard pressed to find.