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Radiation Oncology • Genitourinary Cancers
What constraints do you use for the external beam portion of radiation when combined with brachytherapy boost?
Any difference if patient is undergoing HDR vs LDR? For example, prescription doses are 45Gy for EBRT and 10.5Gy x 2 for HDR boost.
Answer from: Radiation Oncologist at Community Practice
Simply “scale” down your constraints for the bladder, rectum, and fem heads for a 44fx regimen down to 25. It’s a simple mathematical calculation. No need to convert for small bowel or penile bulb, as these tissues should not get a dose from the implant. The scaled constraints allo...
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