| Gao Han,Qian Pudong,Ming Xuezhong,et al.Application of different posture fixation methods in radiotherapy of breast cancer[J].Chinese Journal of Radiological Medicine and Protection,2022,42(1):12-17 |
| Application of different posture fixation methods in radiotherapy of breast cancer |
| Received:September 27, 2021 |
| DOI：10.3760/cma.j.cn112271-20210927-00395 |
| KeyWords:Acuum negative pressure pad Polyurethane styrofoam Breast bracket Breast cancer Radiotherapy |
| FundProject:江苏省卫健委干部保健课题（BJ19031） |
| Author Name | Affiliation | E-mail | | Gao Han | Department of Radiation Oncology, Jiangsu Cancer Hospital, Jiangsu Institute of Cancer Research, Affiliated Cancer Hospital of Nanjing Medical University, Nanjing 210009, China | | | Qian Pudong | Department of Radiation Oncology, Jiangsu Cancer Hospital, Jiangsu Institute of Cancer Research, Affiliated Cancer Hospital of Nanjing Medical University, Nanjing 210009, China | | | Ming Xuezhong | Department of Radiation Oncology, Jiangsu Cancer Hospital, Jiangsu Institute of Cancer Research, Affiliated Cancer Hospital of Nanjing Medical University, Nanjing 210009, China | | | Jiang Ning | Department of Radiation Oncology, Jiangsu Cancer Hospital, Jiangsu Institute of Cancer Research, Affiliated Cancer Hospital of Nanjing Medical University, Nanjing 210009, China | | | Wang Fengyi | Department of Radiation Oncology, Jiangsu Cancer Hospital, Jiangsu Institute of Cancer Research, Affiliated Cancer Hospital of Nanjing Medical University, Nanjing 210009, China | | | Guo Chang | Department of Radiation Oncology, Jiangsu Cancer Hospital, Jiangsu Institute of Cancer Research, Affiliated Cancer Hospital of Nanjing Medical University, Nanjing 210009, China | | | Xu Jun | Department of Radiation Oncology, Jiangsu Cancer Hospital, Jiangsu Institute of Cancer Research, Affiliated Cancer Hospital of Nanjing Medical University, Nanjing 210009, China | | | Sun Li | Department of Radiation Oncology, Jiangsu Cancer Hospital, Jiangsu Institute of Cancer Research, Affiliated Cancer Hospital of Nanjing Medical University, Nanjing 210009, China | 13951637370@126.com |
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| Abstract:: |
| Objective To study the inter-fraction setup errors, intra-fraction movement of patients and its influence on dosimetry, position repeatability of the supraclavicular area, and the plastic stability of the vacuum cushion and styrofoam when one of the three fixation method are applied in the clinical radiotherapy of breast cancer. The three fixation method include acuum negative pressure pad (VP), acuum negative pressure pad combined with a breast bracket (VB), and polyurethane styrofoam combined with a breast bracket (PB).Methods A total of 96 breast cancer patients who received radiotherapy at Jiangsu Cancer Hospital during 2019-2021 were collected prospectively for study. They were randomly divided into three groups (VP, VB, and PB). Cone-Beam CT and a planning system were used to obtain inter-fraction setup errors, intra-fraction movement of patients and its influence on dosimetry, position repeatability of supraclavicular area, and the plastic stability of vacuum pad and polyurethane tyrofoam.Results In the left-right (LR) direction, there were no statistical differences in the inter-fraction setup errors among the three groups. In the superior-inferior (SI) direction, inter-fraction setup errors of the PB group were smaller than those of the VB group (3.02 ±2.04, 3.65 ±2.64, t=2.35, P=0.031). In the anterior-posterior (AP) direction, the inter-fraction setup errors of both the VB and PB groups were smaller than those of the VP group (3.36 ±2.93, 3.14 ±0.98, 4.03 ±2.55, t=2.29, 3.11, P < 0.05). In the AP direction, the intra-fraction movement of patients of the VP and PB groups were less than that of the VB group (1.31 ±0.95, 1.24 ±0.89, 1.88 ±1.33, t=-2.04, -2.31, P < 0.05). Moreover, the intra-fraction movement of patients had no statistical effect on the dosimetric distribution (P> 0.05), and the breast bracket did not improve the position repeatability of the supraclavicular region (P>0.05). In addition, the plastic stability of polyurethane styrofoam was significantly better than that of the acuum negative pressure pad (t=2.43-5.63, P < 0.05).Conclusions The inter-fraction setup errors and intra-fraction movement of patients with breast cancer can be reduced by using PB. Compared to an acuum negative pressure pad, polyurethane styrofoam can keep plastic stability throughout the treatment of the patients. |
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