Do you have any rules of thumb regarding amount of weight loss, a percentage change in the size of the primary/node, or the fit of the mask?
New answer by Radiation Oncologist at University of Michigan (October 13, 2016)
Whenever nodal shrinkage or weight loss reduces the fit of the mask we make a new mask in same position and re-calculate doses using existing IMRT beam and dose fluences. Tumo...