[Application of Imaging-Guided Radiation Therapy in Pelvic Tumor Radiotherapy].

Abstract

OBJECTIVE:

To discuss the influence of setup errors on the accuracy of pelvic cancer in IGRT, analysis setup errors and determine the CTV-to-PTV margins.

METHODS:

60 pelvic cancer patients treated with Varian 23IX, all of them were performed by CBCT before and after-correction three times in the first week and after that once a week. Then, to measure the setup errors at X(left-right), Y(superior-inferior), Z(anterior-posterior) axis and E(coronal), F(sagittal), G(axial) rotation directions.

RESULTS:

530 scans obtained in all, the setup errors in X, Y, Z, E, F, G were (-0.52 ± 4.18) mm, (0.73 ± 4.86) mm, (-0.36 ± 3.62) mm, (0.14 ± 1.20)degrees, (0.13 ± 1.34)degrees, (0.21 ± 1.73)degrees respectively and were much lower after correction at X, Y, Z axis, besides, CTV-to-PTV margins decrease a lot.

CONCLUSION:

The accuracy of radiotherapy can be highly increased with the use of IGRT in pelvic cancer.

• Authors: Bing Wu, Junxiang He, Jingguo Fu, Changli Ruan
• Journal: Zhongguo yi liao qi xie za zhi = Chinese journal of medical instrumentation (Zhongguo Yi Liao Qi Xie Za Zhi) Vol. 39 Issue 4 Pg. 299-301 (Jul 2015) ISSN: 1671-7104 [Print] China
• PMID: 26665956 (Publication Type: Journal Article)

Topics

• Humans
• Pelvic Neoplasms (radiotherapy)
• Radiotherapy Dosage
• Radiotherapy Planning, Computer-Assisted
• Radiotherapy, Image-Guided