Vatnitskiĭ S M, Ermakov I A, Saltykova L M, Cherviakov A M
Med Tekh. 1984 Mar-Apr(2):27-9.
The symmetry and reproducibility of the radiation field in the gamma-therapeutic device should be considered in terms of the recommendations given in the IEC Publications for medical electron accelerators, since the requirements for the exposed dose are similar in both cases. The calculations of the relationship between the source volume luminosity and the dimensions of the collimator system have shown that the increase in the diameter of the shutter hole for the operating beam results in much lower requirements for the source-shutter alignment, and so asymmetry and instability of the radiation field are essentially excluded.
由于两种情况下对受照剂量的要求相似，因此伽马治疗设备中辐射场的对称性和可重复性应按照国际电工委员会（IEC）出版物中关于医用电子加速器的建议来考虑。源体积发光度与准直器系统尺寸之间关系的计算表明，工作束快门孔直径的增加会大大降低对源与快门对准的要求，因此基本上排除了辐射场的不对称性和不稳定性。
