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全身照射(TBI)是异体骨髓移植的必要环节。本文在clinne18直线加速器上建立了全身照射技术。射线能分使用18MVX线,源波距离取450cm。治疗床用液压升降,上下运动15cm范围,并可旋转。在SsD=450cm处,射野可达到157cm×157cm,对角线220cm,在射野的主轴和对角线的80％范围里均匀度好于2.4％。剂量在4.8Rad/分～24.2Rad/分内可选。用出F剂量计和半导体探头进行予照射和照射时的剂量监测,并用
Whole body irradiation (TBI) is a necessary part of allogeneic bone marrow transplantation. In this study, a whole body irradiation technique was established on a clinne18 linear accelerator. The ray energy can be divided into 18MVX lines, and the source wave distance is 450cm. The treatment bed is hydraulically lifted up and down and moves up and down within 15cm and can be rotated. At SsD=450cm, the field can reach 157cm×157cm with a diagonal of 220cm, and the uniformity is better than 2.4% in the 80% range of the main axis and diagonal of the field. Dosages are selectable from 4.8 Rad/minute to 24.2 Rad/minute. Dosage monitoring with pre-irradiation and irradiation with an F-dosimeter and semiconductor probe, and use