The study, led by Eric A. Mellon, M.D., Ph.D. and Kaylie Cullison, Ph.D., at Sylvester Comprehensive Cancer Center, is the first to quantify tumor changes in glioblastoma patients receiving MRI-guided radiation therapy. This novel technique, also known as MRI-linear accelerator or MRI-linac, pairs daily imaging with radiation. Sylvester was the first to use this technology for patients with glioblastoma and remains one of the few cancer centers to offer it for the disease.