Use of emission guided radiation therapy can better spare critical structures compared with intensity modulated radiation therapy, volumetric modulated arc therapy, or proton therapy.

by S. N. Seyedin, O. R. Mawlawi, L. M. Turner, S. Mazin, Y. Voronenko, P. D. Olcott, C. A. Wages et al. | Int. J. of Radiation Oncology, Biology, Physics 93, no. 3 (2015).