Department of Radiological Technology, National Hospital Organization Kagoshima Medical Center, 8-1 Shiroyama-cho, Kagoshima, 892-0853, Japan.
Department of Health Sciences, Graduate School of Medicine, Kyushu University, Fukuoka, Japan.
Radiol Phys Technol. 2024 Dec;17(4):938-946. doi: 10.1007/s12194-024-00840-8. Epub 2024 Sep 9.
This study investigated the effectiveness of placing skin-ring structures to enhance the precision of skin dose calculations in patients who had undergone head and neck volumetric modulated arc therapy using the Acuros XB algorithm. The skin-ring structures in question were positioned 2 mm below the skin surface (skin A) and 1 mm above and below the skin surface (skin B) within the treatment-planning system. These structures were then tested on both acrylic cylindrical and anthropomorphic phantoms and compared with the Gafchromic EBT3 film (EBT3). The results revealed that the maximum dose differences between skins A and B for the cylindrical and anthropomorphic phantoms were approximately 12% and 2%, respectively. In patients 1 and 2, the dose differences between skins A and B were 9.2% and 8.2%, respectively. Ultimately, demonstrated that the skin-dose calculation accuracy of skin B was within 2% and did not impact the deep organs.
本研究旨在探讨在使用 Acuros XB 算法进行头颈部容积调强弧形治疗的患者中，通过放置皮肤环结构来提高皮肤剂量计算精度的效果。所研究的皮肤环结构位于皮肤表面下方 2 毫米处（皮肤 A）和皮肤表面上方和下方 1 毫米处（皮肤 B）。然后在丙烯酸圆柱和人体模型上对这些结构进行了测试，并与 Gafchromic EBT3 胶片（EBT3）进行了比较。结果表明，对于圆柱和人体模型，皮肤 A 和皮肤 B 之间的最大剂量差异分别约为 12%和 2%。在患者 1 和 2 中，皮肤 A 和皮肤 B 之间的剂量差异分别为 9.2%和 8.2%。最终表明，皮肤 B 的皮肤剂量计算精度在 2%以内，且不会影响深部器官。
