Research Masterclass in Radiotherapy Physics 2017

Repeated MRI to monitor tumor shrinkage

After 30 Gy, the GTVs decreased an average of 46% (6.1–100%). The TVs on the intratreatment MRI remained sufficiently covered by the 95% isodose. Repeated IMRT planning can improve the sparing of the bowel and rectum in patients with substantial tumor regression. Van de Bunt L. et al. Int J Radiat Oncol Biol Phys 2006;64:189-96