The invention comprises a method and apparatus for proton treatment of a tumor, comprising the steps of a central control system: (1) receiving an initial cancer treatment irradiation plan； (2) directing a treatment of the tumor using the positively charged particles； (3) during a treatment session and after the step of directing the treatment of the tumor, receiving imaging input from an imaging system； (4) generating an updated cancer treatment irradiation plan using the imaging input； (5) continuing the treatment session using the updated cancer treatment irradiation plan； and (6) optionally, while the patient remains in the treatment room and under approval of a medical professional not in line of sight of the patient, repeating at least three times the steps of: receiving imaging input from the imaging system； generating an updated cancer treatment irradiation plan； and continuing the treatment session using the updated cancer treatment irradiation plan.
