Serago C F, Lewin A A, Houdek P V, González-Arias S, Hartmann G H, Abitbol A A, Schwade J G
Miami Stereotactic Radiosurgery Center, Baptist Hospital of Miami, FL.
Int J Radiat Oncol Biol Phys. 1991 Mar;20(3):517-23. doi: 10.1016/0360-3016(91)90064-b.
Stereotactic radiosurgery with a linear accelerator requires the accurate determination of a target volume and an accurate match of the therapeutic radiation dose distribution to the target volume. X ray and CT localizers have been described that are used to define the target volume or target point from angiographic or CT data. To verify the accuracy of these localizers, measurements were made with a target point simulator and an anthropomorphic head phantom. The accuracy of determining a known, high contrast, target point with these localizers was found to be a maximum of +/- 0.5 mm and +/- 1.0 mm for the X ray and CT localizer, respectively. A technique using portal X rays taken with a linear accelerator to verify the target point is also described.
使用直线加速器进行立体定向放射外科手术需要精确确定靶体积，并使治疗性辐射剂量分布与靶体积精确匹配。已经描述了用于从血管造影或CT数据定义靶体积或靶点的X射线和CT定位器。为了验证这些定位器的准确性，使用靶点模拟器和人体头部模型进行了测量。发现使用这些定位器确定已知的高对比度靶点的准确性，对于X射线定位器和CT定位器分别最高为±0.5毫米和±1.0毫米。还描述了一种使用直线加速器拍摄的门静脉X射线来验证靶点的技术。
