Do you ever perform adaptive replanning for interfraction tumor volume changes appreciated during a fractionated SRS (5 fx) treatment for CNS metastases?
In particular, if the tumor volume has decreased, would you consider adapting the plan to reduce the risk for toxicity, considering healthy brain tissue/pushing margin would be closer to the center of the treatment volume with higher doses?
1 Answer
Mednet Member
Radiation Oncology · Lynn Cancer Institute - Baptist Health City, Baptist Health South Florida
Answered on
I have done adaptive re-planning in the past for tumors that had obviously grown based on CBCT (i.e., intraventricular metastases) from the time of sim to treatment for LINAC-based SRS. I think certainly in the other situation (i.e., obvious decline in size of tumor where one is quite confident base...
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