| 孟祥银,杨波,祝起禛,梁永广,周震,邱杰.立体定向放疗计划验证模体在脑转移瘤HyperArc技术中的应用研究[J].中华放射医学与防护杂志,2023,43(12):991-996 |
| 立体定向放疗计划验证模体在脑转移瘤HyperArc技术中的应用研究 |
| Application of stereotactic body radiotherapy planning verification phantom in HyperArc technique for brain metastases |
| 投稿时间：2023-03-17 |
| DOI：10.3760/cma.j.cn112271-20230317-00082 |
| 中文关键词: StereoPhan模体 SRS MapCHECK半导体矩阵 HyperArc 剂量验证 |
| 英文关键词:StereoPhan phantom SRS MapCHECK semiconductor matrix HyperArc Dose verification |
| 基金项目:国家重点研发计划资助(2022YFC2404606);中央高水平医院临床科研业务费资助项目(2022-PUMCH-B-116) |
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| 中文摘要: |
| 目的 探究StereoPhan(SP)模体与SRS MapCHECK(SMC)半导体矩阵用于脑转移瘤患者HyperArc(HA)计划剂量验证的可行性。方法 选取16例在北京协和医院接受HA放射治疗的脑转移瘤患者为研究对象,分别将电离室和SMC半导体矩阵插入SP模体,测量患者的HA验证计划的点剂量与平面剂量,并与治疗计划系统(TPS)计算数据对比,平面剂量的γ分析标准取2 mm/3%、2 mm/2%、1 mm/3%和1 mm/2%。结果 16例患者的点剂量平均偏差是1.33%±0.84%,平面剂量γ通过率在2 mm/3%、2 mm/2%的标准下依次为99.72%±0.46%、98.93%±1.32%,在 1 mm/3% 、1 mm/2%的标准下依次为98.85%±1.79%、97.13%±3.19%。结论 SP模体与SMC半导体矩阵适合用于开展脑转移瘤患者HA计划的剂量验证工作,在进行点剂量和平面剂量验证时,可以分别采用3%和1mm/2%的分析标准。 |
| 英文摘要: |
| Objective To explore the feasibility of StereoPhan (SP) phantoms and SRS MapCHECK (SMC) semiconductor matrices in the dose verification of HyperArc (HA) plans for patients with brain metastases (BM).Methods A total of 16 BM patients who received HA radiotherapy in the Peking Union Medical College Hospital were enrolled in this study. The ion chamber and the SMC semiconductor matrix were inserted into SP phantoms, respectively. The point and planar doses in HA verification plans were measured and compared with the calculated data of the treatment planning system (TPS). The criteria for planar dose γ analysis were set at 2 mm/3%, 2 mm/2%, 1 mm/3%, and 1 mm/2%.Results The mean deviation of point doses in 16 patients was 1.33%±0.84%. Based on the above criteria, the γ pass rates of planar doses were 99.72%±0.46%, 98.93%±1.32%, 98.85%±1.79%, and 97.13%±3.19%, respectively.Conclusions SP phantoms and SMC semiconductor matrices are applicable to the dose verification of HA plans for BM patients. The analytical criteria of 3% and 1 mm/2% can be used for verifying point and planar doses, respectively. |
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