Application of BodyFIX combined with abdominal pressure plate in stereotactic body radiotherapy for liver cancer(PDF)
《中国医学物理学杂志》[ISSN:1005-202X/CN:44-1351/R]
- Issue:
- 2018年第3期
- Page:
- 265-268
- Research Field:
- 医学放射物理
- Publishing date:
Info
- Title:
- Application of BodyFIX combined with abdominal pressure plate in stereotactic body radiotherapy for liver cancer
- Author(s):
- LI Yaning; LU Shipei; PENG Yinglin; SHAO Jianhui; YANG Xin; LIN Chengguang
- Department of Radiation Oncology, Sun Yat-sen University Cancer Center, Guangzhou 510060, China
- Keywords:
- ; liver cancer; stereotactic body radiotherapy; BodyFIX combined with abdominal pressure plate; breathing movement; setup errors
- PACS:
- 1005-202X（2018）03-0265-04
- DOI:
- DOI:10.3969/j.issn.1005-202X.2018.03.004
- Abstract:
- Objective To compare the setup errors between two groups of liver cancer patients, namely one group treated with BodyFIX combined with abdominal pressure plate and the other one treated with vacuum bag, evaluate the advantages and disadvantages of BodyFIX combined with abdominal pressure plate, and discuss its clinical significance in stereotactic body radiotherapy (SBRT) for liver cancer. Methods Twenty patients with primary hepatic cancer were selected in this study. Ten patients were treated with BodyFIX combined with abdominal pressure plates and the other ten were treated with vacuum bags. All patients received SBRT, with 6.5 Gy/fraction, once every other day, and totally for six times. Cone beam computed tomography was performed before each treatment for the patients. The setup errors in the two groups were recorded and analyzed. Results In the group treated with vacuum bags, the linear errors in X (left-right), Y (superior-inferior) and Z (anterior-posterior) directions were (0.28±3.19), (-2.22±5.75) and (-0.66±3.85) mm, respectively, and the corresponding MPTV were 8.06, 13.92 and 9.78 mm, respectively. The linear errors of the group treated with BodyFIX combined with abdominal pressure plate in X, Y and Z directions were (2.14±2.61), (-1.94±3.78) and (0.22±2.50) mm, respectively, and the corresponding MPTV were 6.57, 7.57 and 5.98 mm, respectively. The comparison of linear errors revealed that P values in X, Y and Z directions were 0.480, 0.003 and 0.001, respectively, with statistically significant differences in Y and Z directions. Conclusion Compared to vacuum bags, BodyFIX combined with abdominal pressure plate can not only restrain the amplitude of breathing movement and reduce setup errors, but also decrease MPTV and increase fractional dose. BodyFIX combined with abdominal pressure plate is of great value in improving the therapeutic effect of radiotherapy for liver cancer.
Last Update: 2018-03-21