Proton Beam Therapy in the Treatment of Esophageal Cancer

"* The daily prescription dose will be 1.8 or 2 Gy RBE (Relative Biologic Equivalence) to be delivered to the periphery of the planning target volume (PTV).~* The Mevion S-250 Proton Radiation Beam Therapy System will be used."

-Prior to start of therapy, end of chemoradiation (day of end of treatment or up to 1 week after), 8 weeks, 4, 6, 9, and 12-months following end of chemoradiation