DOSIMETRIC PROJECTION OF COLLIMATOR GEOMETRY

A method of calculating radiation dose includes dosimetric projection of a collimator geometry. The method includes defining a three-dimensional (3D) geometry of a collimating device which defines an aperture configured to allow a radiation beam passing through, projecting the collimating device along the radiation beam into a two-dimensional (2D) geometry in a plane, calculating dosimetric opacity values of the collimating device at locations adjacent to the aperture based on the 3D geometry of the collimating device, and calculating transport of the radiation beam through the collimating device based on the 2D geometry projected in the plane and using the dosimetric opacity values of the collimating device at the locations adjacent to the aperture. 一种计算辐射剂量的方法包括准直器几何结构的剂量测定投影。方法包括限定准直设备的三维(3D)几何结构，三维几何结构限定被配置为允许辐射束穿过的孔，将准直设备沿辐射束投影到平面中的二维(2D)几何结构中，基于准直设备的3D几何结构来计算在邻近孔的位置处的准直设备的剂量测定不透明度值，以及基于在平面中所投影的2D几何结构并且使用在邻近孔的位置处的准直设备的剂量测定不透明度值来计算通过准直设备的辐射束的传送。