中国医疗设备2024，Vol.39Issue(7)：49-53,68,6.DOI:10.3969/j.issn.1674-1633.2024.07.008
摆位误差对乳腺癌术后放疗患者心脏剂量影响
Effect of Set-up Error on Cardiac Dose in Postoperative Radiotherapy Patients with Breast Cancer
周海英 1郭冉 2杨慧鹏 2赵聪 2苗亚丽 2王晗 2高运宾 2孙宗文2
作者信息
- 1. 济宁医学院 临床医学院,山东 济宁 272000
- 2. 济宁市第一人民医院 肿瘤科,山东 济宁 272000
- 折叠
摘要
Abstract
Objective To investigate the effect of simulated set-up error on cardiac irradiation dose of left breast cancer patients after postoperative radiotherapy.Methods A total of 17 left breast cancer patients undergone modified radical mastectomy were enrolled as research object.In the planning system,the deviation of the center of the target volume relative to the center of the planned field was simulated,including moving 5 mm each towards the superior(S),inferior(I),left(L),right(R),anterior(A),and posterior(P).The cardiac irradiation dose was then assessed,with an analysis focusing on the influence of these set-up errors on cardiac dose.Results The mean cardiac irradiation dose(Dmean)of the original plan was 5.72 Gy.After the isocenter of irradiation beam were moved with 5 mm in six different directions,the cardiac irradiation dose decreased at the L,A,and S directions,while the cardiac irradiation dose increased at the R,P,and I directions.The cardiac irradiation dose Dmean increased by(1.46±0.24)Gy at the P direction,(1.14±0.17)Gy at the R direction,and(0.43±0.25)Gy at the I direction.Conclusion Set-up errors in the R,P,I directions during radiotherapy after modified radical mastectomy for left breast cancer can result in an elevated dose of cardiac irradiation.Set-up errors in the L,A,S directions can decrease the cardiac irradiation dose.关键词
乳腺癌/改良根治术/放射治疗/摆位误差/心脏剂量Key words
breast cancer/modified radical mastectomy/radiation therapy/set-up error/cardiac dose分类
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周海英,郭冉,杨慧鹏,赵聪,苗亚丽,王晗,高运宾,孙宗文..摆位误差对乳腺癌术后放疗患者心脏剂量影响[J].中国医疗设备,2024,39(7):49-53,68,6.
