The invention designs the segmented short-arc VMAT plan, modified from the original long-arc VMAT, to fit the breath-hold interval. The modified VMAT of the invention has the advantages of its applicability to different planning systems for variously long arcs and its preprogrammed arc segmentation for summated dose consistency. Using segmented short-arc modification from the original long-arc VMAT plan is accurate for dose planning and delivery, as well as tolerable for breath-hold VMAT.本發明設計分段的短弧VMAT設計,修改自原長弧VMAT,以適合屏氣時間間隔。本發明經修改的VMAT具有應用於各種長弧的不同設計系統以及總合劑量一致性之預編程弧分段的優點。使用修飾自長弧VMAT設計的分段短弧在劑量設計及傳送是準確的,且可耐受屏氣VMAT。
