- Tohoku University Medical Press
- The Tohoku Journal of Experimental Medicine (ISSN:00408727)
- vol.94, no.1, pp.37-43, 1968 (Released:2008-11-28)
A linear accelerator applied to conformation radiotherapy was described. The mechanism and dose distribution in the linear accelerator conformation radiotherapy were discussed, together with a comparison with those in telecobalt therapy. In this machine a collimator was divided into six leaves, which were driven independently by a servo system following signals given by the signal generator. The mechanical error in this system was within a range of +1.47 to-1.80%. The size and shape of radiation-dense area, ‘beam focus’, made by this unit sufficiently coincided geometrically with the region of planned treat-ments. The homogeneity of dose distribution was better than that by telecobalt gamma-rays.