Chierego G, Marchetti C, Avanzo R C, Pozza F, Colombo F
Servizio di Fisica Sanitaria, U.L.S.S. no. 8, Vincenza, Italy.
Radiother Oncol. 1988 Jun;12(2):141-52. doi: 10.1016/0167-8140(88)90168-5.
The aim of this paper is to present the physical and dosimetrical features of the stereotaxic radiosurgical method already published by the authors. This method concentrates the dose into the stereotaxic target volume, placed at the isocenter of a 4 MV X-ray beam. Computer calculations showed that: 9-17 arcs provide almost spherical dose distributions; the optimal photon beam quality is about 4-6 MV. The angle between adjacent rotation planes is 20-40 degrees and the arcs are 100-160 degrees wide. In this way the dose to healthy tissue is minimized. The dose distribution was experimentally verified both by ionometric and photodensitometric methods. The procedure for dose calculation at isocenter of fields as small as required by the radiotherapist, has been investigated.
本文的目的是介绍作者已经发表的立体定向放射外科方法的物理和剂量学特征。该方法将剂量集中于位于4兆伏X射线束等中心的立体定向靶体积内。计算机计算表明：9至17个弧提供几乎呈球形的剂量分布；最佳光子束质量约为4至6兆伏。相邻旋转平面之间的角度为20至40度，弧宽为100至160度。通过这种方式，对健康组织的剂量被最小化。剂量分布通过电离测量法和光密度测量法进行了实验验证。已经研究了按照放射治疗师要求的尽可能小的射野等中心处的剂量计算程序。
