| Zhuang Tingting,Lin Baihan,Li Dongsheng,Wu Lili.Dosimetric comparison of stereotactic body radiation therapy plans for spine metastasis using flattening filter free and flattening filter modes[J].Chinese Journal of Radiological Medicine and Protection,2016,36(1):63-66 |
| Dosimetric comparison of stereotactic body radiation therapy plans for spine metastasis using flattening filter free and flattening filter modes |
| Received:September 02, 2015 |
| DOI：10.3760/cma.j.issn.0254-5098.2016.01.012 |
| KeyWords:Spine metastasis Stereotactic body radiation therapy Flattening filter free Dosimetry |
| FundProject: |
| Author Name | Affiliation | E-mail | | Zhuang Tingting | Department of Radiation Oncology, Cancer Hospital of Shantou University Medical College, Shantou 515031, China | | | Lin Baihan | Department of Radiation Oncology, Cancer Hospital of Shantou University Medical College, Shantou 515031, China | | | Li Dongsheng | Department of Radiation Oncology, Cancer Hospital of Shantou University Medical College, Shantou 515031, China | | | Wu Lili | Department of Radiation Oncology, Cancer Hospital of Shantou University Medical College, Shantou 515031, China | lily_wu_ph@qq.com |
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| Abstract:: |
| Objective To compare the dosimetric difference of stereotactic body radiation therapy (SBRT) plans for spine metastasis using 6 MV X-ray flattening filter free (FFF) and flattening filter (FF) modes. Methods A total of nine previously treated patients with a total of twelve spine metastasis were retrospectively included and replanned using FFF-SBRT and FF-SBRT, respectively. The dose-volume histograms (DVH), target conformity index (CI), monitor unites (MUs) and treatment time of target volume, organs at risk and normal tissues were compared between the plans. Results Both FFF-SBRT and FF-SBRT met the clinical objectives. Dose distribution of target volume, organs at risk and normal tissues were similar. MUs of the FFF-SBRT were significantly higher than that of FF-SBRT (t=-5.20, P<0.01), while the treatment time was almost half of the latter (t=17.27, P<0.01). ConclusionsTwo plan modes are both clinically acceptable. FFF-SBRT plans are delivered in less time and with better efficiency. Trial registration Chinese clinical trial registry, ChiCTR-TRC-14004281. |
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