Rosenthal M S, Nath R
Med Phys. 1983 Jul-Aug;10(4):475-9. doi: 10.1118/1.595394.
A technique for the automatic reconstruction of the spatial coordinates of seeds in an interstitial implant has been developed. Seed coordinates from three isocentric radiographs, an anterior-posterior film, and an orthogonal pair of films taken at gantry angles of +/- 45 degrees from the anterior-posterior direction are digitized and recorded in a random sequence. From this, the three-dimensional coordinates of the seeds in the implant are computed by matching the values of common coordinates along the axis of rotation. This rotate and match technique leads to an accurate and consistent identification and reconstruction of seeds with 90% of them within 2 mm of their actual location. These new computer routines have been added to an existing treatment planning system (AECL TP-11 treatment planning system, version 5A). We present our algorithm and technique along with clinical examples.
已开发出一种用于自动重建组织间植入物中籽源空间坐标的技术。来自三张等中心射线照片、一张前后位片以及从前后方向以±45度机架角度拍摄的一对正交片的籽源坐标被数字化，并以随机顺序记录。据此，通过匹配沿旋转轴的公共坐标值来计算植入物中籽源的三维坐标。这种旋转和匹配技术能够准确且一致地识别和重建籽源，其中90%的籽源位于其实际位置的2毫米范围内。这些新的计算机程序已被添加到现有的治疗计划系统（AECL TP - 11治疗计划系统，版本5A）中。我们将展示我们的算法和技术以及临床实例。
