Computer system for radiation therapy with negative pions

Since 1974 Cancer Therapy Research has been conducted at the Clinton P. Anderson Meson Physics Facility, Los Alamos Scientific Laboratory, Los Alamos, New Mexico using negative pi-mesons. Through 1977 all treatments will have been static scan treatments, during which a DEC PDP-11/45 computer was used to monitor, record and verify channel and treatment parameters. This computer system has an RSX-11D operating system, and communicates with hardware via CAMAC. Beginning in 1978, dynamic scan treatments will commence and the patient will be moving during the treatment. A PDP-11/03 microprocessor will be used to move the patient in three dimensions and one rotation, and to control beam-modification devices such as slit jaws and a variable-thickness range shifter. Simultaneously the treatment will be monitored and verified by the PDP-11/45 computer