Andrew J W, Aldrich J E
Med Phys. 1982 Mar-Apr;9(2):279-83. doi: 10.1118/1.595085.
A microcomputer-based system for radiotherapy beam compensator design has been constructed. A patient surface measuring device which projects a grid pattern on the patient is attached to the collimator of a therapy treatment simulator. A linear motion potentiometer, pivoted at one end on a ball joint attached to the collimator, is extended to touch each grid point in turn. The extension of the potentiometer is monitored by a microcomputer which calculates the coordinates of the patient's surface as each grid point is entered. A template for compensator construction is subsequently printed on the microcomputer printer. The patient surface profile along any grid line can also be plotted and used in conjunction with the compensator data to produce an isodose distribution for the compensated field.
已构建了一个基于微型计算机的放射治疗射束补偿器设计系统。一个将网格图案投射到患者身上的患者表面测量装置连接到治疗模拟机的准直器上。一个线性运动电位计，其一端在连接到准直器的球形接头上枢转，依次延伸以接触每个网格点。电位计的延伸量由微型计算机监测，当每个网格点输入时，微型计算机计算患者表面的坐标。随后在微型计算机打印机上打印补偿器构建模板。沿任何网格线的患者表面轮廓也可以绘制出来，并与补偿器数据结合使用，以生成补偿野的等剂量分布。
