Comparative study on dosimetry of VMAT and IMRT in assisted radiotherapy after radical resection of rectal cancer

Oncology Letters
Jianguo ShiFenge Jiang

Abstract

The present study compared the dosimetric differences of volumetric modulated arc therapy (VMAT) and 7-field intensity modulated radiation therapy technology (7F-IMRT) in assisted radiotherapy plan after resection of rectal carcinoma. Ten cases of patients at stages II-III of rectal cancer transabdominal resection with postoperative pelvic radiotherapy underwent 7F-IMRT and VMAT radiotherapy plan design using the CMS Monaco treatment planning system. We compared the dose distribution, the number of organs at risk and the number of machines in the two groups. The 7F-IMRT plans conformal index (CI) was 0.8319±0.0143 and VMAT plans CI was 0.838±0.164. Both plans reached up to the 95% isodose line at a volume of 100% planning target volume (PTV), the 7F- IMRT plans homogeneity index (HI) was 1.0760±0.0179, and the VMAT plans HI was 1.0821±0.0143. CI and HI had no statistical difference. With regard to S40, the V50 dose volume of the small intestine was endangered, and the VMAT plan was better than that of the 7F-IMRT plan, and the difference was statistically significant (P<0.05). The machine hop numbers of the two types of plans were 594.1±36.1 and 793.2 ±56.6 for for VMAT and 7F-IMRT, respectively. The VMAT plan was less than hta...Continue Reading

References

Sep 6, 2003·International Journal of Radiation Oncology, Biology, Physics·Jian Z WangRobert D Stewart
Apr 19, 2006·International Journal of Radiation Oncology, Biology, Physics·Eric J Hall
Jan 23, 2009·Radiotherapy and Oncology : Journal of the European Society for Therapeutic Radiology and Oncology·Eugenio VanettiLuca Cozzi
Jan 2, 2010·International Journal of Radiation Oncology, Biology, Physics·Sua YooFang-Fang Yin
Mar 8, 2011·Medical Dosimetry : Official Journal of the American Association of Medical Dosimetrists·Robert W KoppKehkashan Ahmad
Aug 9, 2011·Clinical Oncology : a Journal of the Royal College of Radiologists·S CillaA G Morganti
Jun 19, 2012·International Journal of Radiation Oncology, Biology, Physics·Enzhuo M QuanXiaodong Zhang
Aug 27, 2013·Medical Dosimetry : Official Journal of the American Association of Medical Dosimetrists·Xiance JinCongying Xie

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Software Mentioned

Monaco CMS
SPSS
VMAT

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