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Dosimetric comparison between jaw tracking and static jaw techniques in intensity-modulated radiotherapy
Feng, Zhongsu1; Wu, Hao2; Zhang, Yibao2; Zhang, Yunjun3; Cheng, Jinsheng1; Su, Xu1
关键词Jaw tracking IMRT Dosimetry OARs sparing
刊名RADIATION ONCOLOGY
2015-01-27
DOI10.1186/s13014-015-0329-4
10
收录类别SCI
文章类型Article
WOS标题词Science & Technology
类目[WOS]Oncology ; Radiology, Nuclear Medicine & Medical Imaging
研究领域[WOS]Oncology ; Radiology, Nuclear Medicine & Medical Imaging
关键词[WOS]LUNG-CANCER NSCLC ; FILTER-FREE BEAMS ; CONFORMAL RADIOTHERAPY ; RADIATION PNEUMONITIS ; ESOPHAGEAL CANCER ; IMRT ; FEASIBILITY ; THERAPY ; SYSTEM
英文摘要

Purpose: To compare the dosimetric differences between jaw tracking technique (JTT) and static jaw technique (SJT) in dynamic intensity-modulated radiotherapy (d-IMRT) and assess the potential advantages of jaw tracking technique.

Methods: Two techniques, jaw tracking and static jaw, were used respectively to develop the d-IMRT plans for 28 cancer patients with various lesion sites: head and neck, lungs, esophageal, abdominal, prostate, rectal and cervical. The dose volume histograms (DVH) and selected dosimetric indexes for the whole body and for organs at risk (OARs) were compared. A two dimensional ionization chamber Array Seven29 (PTW, Freiburg, Germany) and OCTAVIUS Octagonal phantom (PTW, Freiburg, Germany) were used to verify all the plans.

Results: For all patients, the treatment plans using both techniques met the clinical requirements. The V-5, V-10, V-20, V-30, V-40 (volumes receiving 5, 10, 20, 30 and 40 Gy at least, respectively), mean dose (D-mean) for the whole body and V-5, V-10, V-20, Dmean for lungs in the JTT d-IMRT plans were significantly less than the corresponding values of the SJT d-IMRT plans (p < 0.001). The JTT d-IMRT plans deposited lower maximum dose (D-max) to the lens, eyes, brainstem, spinal cord, and right optic nerve, the doses reductions for these OARs ranged from 2.2% to 28.6%. The JTT d-IMRT plans deposited significantly lower D-mean to various OARs (all p values < 0.05), the mean doses reductions for these OARs ranged from 1.1% to 31.0%, and the value reductions depend on the volume and the location of the OARs. The gamma evaluation method showed an excellent agreement between calculation and measurement for all techniques with criteria of 3%/3 mm.

Conclusions: Both jaw tracking and static jaw d-IMRT plans can achieve comparable target dose coverage. JTT displays superior OARs sparing than SJT plans. These results are of clinical importance, especially for the patients with large and complex targets but close to some highly radio-sensitive organs to spare, and for patients with local recurrent or secondary primary malignant lesion within a previously irradiated area.

语种英语
WOS记录号WOS:000349283700001
项目编号201002009
资助机构National Health and Family Planning Commission of China
引用统计
被引频次:5[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.bjmu.edu.cn/handle/400002259/63458
专题北京大学临床肿瘤学院
医学人文研究院/公共教学部_哲学与社会科学系
作者单位1.Chinese Ctr Dis Control & Prevent, Chinese Ctr Med Response Radiat Emergency, Natl Inst Radiol Protect, Beijing 100088, Peoples R China
2.Peking Univ, Canc Hosp & Inst, Dept Radiotherapy, Key Lab Carcinogenesis & Translat Res,Minist Educ, Beijing 100142, Peoples R China
3.Peking Univ, Hlth Sci Ctr, Sch Fdn Educ, Beijing 100191, Peoples R China
推荐引用方式
GB/T 7714
Feng, Zhongsu,Wu, Hao,Zhang, Yibao,et al. Dosimetric comparison between jaw tracking and static jaw techniques in intensity-modulated radiotherapy[J]. RADIATION ONCOLOGY,2015,10.
APA Feng, Zhongsu,Wu, Hao,Zhang, Yibao,Zhang, Yunjun,Cheng, Jinsheng,&Su, Xu.(2015).Dosimetric comparison between jaw tracking and static jaw techniques in intensity-modulated radiotherapy.RADIATION ONCOLOGY,10.
MLA Feng, Zhongsu,et al."Dosimetric comparison between jaw tracking and static jaw techniques in intensity-modulated radiotherapy".RADIATION ONCOLOGY 10(2015).
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