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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