Comparison and analysis of physical dose parameters between two different planning systems for radiotherapy in thoracic cancer(PDF)
《中国医学物理学杂志》[ISSN:1005-202X/CN:44-1351/R]
- Issue:
- 2018年第5期
- Page:
- 526-531
- Research Field:
- 医学放射物理
- Publishing date:
Info
- Title:
- Comparison and analysis of physical dose parameters between two different planning systems for radiotherapy in thoracic cancer
- Author(s):
- YAO Lei1; XIA Bing1; ZENG Cheng2; ZHANG Shuo1; JI Tianlong1; YI Haiyun1; SUN Lu1
- 1. Department of Radiation Oncology, the First Affiliated Hospital of China Medical University, Shenyang 110001, China;
2. Department of Radiation Oncology, Shenyang Fifth People Hospital, Shenyang 110001, China
- Keywords:
- ; thoracic cancer; intensity-modulated radiotherapy; dose-volume histogram; Oncentra planning system; Raystation planning system
- PACS:
- R730.55
- DOI:
- DOI:10.3969/j.issn.1005-202X.2018.05.006
- Abstract:
- Objective To investigate the differences of the physical dose evaluation in different intensity-modulated radiotherapy (IMRT) plans and compare the dose-volume histogram (DVH) parameters between Oncentra and Raystation planning systems for providing a basis for selecting a better treatment option. Methods A retrospective analysis was performed on the clinical data of 129 thoracic tumor patients. With the same field, segment, monitor units and computational grid in the same accelerator (Elekta Synergy), the D98, D95, D50 and D2 of target areas, the D2 of spinal cord and the V5, V20, mean dose of lung were calculated with Oncentra 4.3 and Raystation 4.72 planning systems. Results The same treatment plan, including RT image, RT plan and RT structure, was calculated by two different planning systems (keeping the same computational grid), and the results revealed some differences in the DVH. The differences were relatively larger in Lung_V5, Lung_V20, Lung_Dmean, and relatively smaller in Cord_D2 and PTV_D98, PTV_D95, PTV_D50, PTV_D2. Except for Lung_V5, the other differences were in the normal distribution, with statistical significance. Conclusion Due to the differences between different planning systems, the differences in dose distributions between the different planning systems which were caused by modeling and algorithms should be attentive, especially the whole lung dose in thoracic tumor patients which should be analyzed based on the comprehensive consideration of the condition of specific case and the selection of planning system.
Last Update: 2018-05-22