A Double-Headed Fixed Beam Teletherapy Machine for Low Cost Megavoltage Therapy

摘要: Compared to kilovoltage radiation, megavoltage radiation has important advantages for external therapy, but the much higher costs of machines and treatment rooms have prevented more general use. Figure 1 shows an arrangement which greatly lowers therapy. Two identical are served from one double-headed machine mounted in wall between two rooms. The teletherapy source, either cobalt 60 or cesium 137, is middle “off” position can be moved into head by a steel cable operated manually control wheel. Automatic return source at end time provided spring. While patient treated room, next set up adjoining similar Failla's layout Memorial Hospital 4 g radium bomb. beam always directed straight down. Its size shape adjusted with shielding blocks placed on tray below each head...