Effect of field angle setting on dose calculation accuracy in intensity-modulated radiotherapy plans for patients with metal implants(PDF)
《中国医学物理学杂志》[ISSN:1005-202X/CN:44-1351/R]
- Issue:
- 2019年第8期
- Page:
- 882-886
- Research Field:
- 医学放射物理
- Publishing date:
Info
- Title:
- Effect of field angle setting on dose calculation accuracy in intensity-modulated radiotherapy plans for patients with metal implants
- Author(s):
- ZHAO Peifeng; SUN Yanze; ZHOU Gang
- Department of Radiotherapy Oncology, the Second Affiliated Hospital of Soochow University/Institute of Radiotherapy Oncology, Soochow University/Suzhou Key Laboratory for Radiation Oncology, Suzhou 215004, China
- Keywords:
- ; Keywords: metal implant; intensity-modulated radiotherapy; field angle; dose calculation
- PACS:
- R811.1
- DOI:
- DOI:10.3969/j.issn.1005-202X.2019.08.004
- Abstract:
- dose calculation deviation was 3.15%, 8.75%, 13.33% on uncorrected image, and 1.54%, 5.93%, 9.06% on the image corrected with MAR. For 7-field IMRT plan, the dose calculation deviation was 3.03%, 5.28%, 10.71% on the uncorrected image, and 1.29%, 4.38% and 7.75% on the image corrected with MAR. Conclusion The incident path of the radiation field passing through the metal region which will significantly affect the accuracy of dose calculation should be avoided in IMRT plan. Although the effect can be improved by MAR, the presence of 2 or more such fields in IMRT plan can result in clinically unacceptable dose calculation deviations.
Last Update: 2019-08-26