[Home ] [Archive]    
:: Main :: About :: Current Issue :: Archive :: Search :: Submit :: Contact ::
:: Volume 15, Number 2 (4-2017) ::
IJRR 2017, 15(2): 177-183 Back to browse issues page
Radiation treatment planning for prostate cancer: A new dosimetric comparison of five and seven fields IMRT plans
S.R.M. Mahdavi, E. Jazayeri Gharehbagh, Dr. A.R. Nikoofar , B. Mofid, M. Vasheghani, D. Saedi
Department of Radiation Oncology, Iran University of Medical Sciences, Tehran, Iran , arnikoofar@gmail.com
Abstract:   (842 Views)

Background: To compare the dosimetric coverage of the planning target volume (PTV) and the dose delivered to the main Organs at Risk (OARs) in 5 and 7-field techniques of Intensity Modulated Radiation Therapy (IMRT) in patients with local prostate cancer. Materials and Methods: Twelve patients with local prostate cancer underwent 5 and 7-field IMRT planning. The delivery of IMRT was carried out using the sliding technique. The dose coverage for PTV was designated to ≥98% of the PTV covered by 95% of the prescribed dose. Dose conformity was evaluated by comparing the volume of nontarget tissue receiving maximum, and average of the prescribed dose and the dose of 33%, 50%, and 66% of the volumes on both planning sets. For target, this evaluation was made with comparing the Conformity Index (CI) and Inhomogeneity Index (HI). In addition, we compared the monitor units used for dose delivery in both planning techniques. Results: All the 5 and 7-field IMRT plans differed slightly in the measured parameters, and none of them have statistically significant differences with each other except for the monitor units where significant differences were observed in favor of the 5-field IMRT plans (p=0.000). In all of the 5-field IMRT plans the mean dose delivered to OARs were very similar or less than that of the 7-field plans. Conclusion: In comparison to the 7-field technique, the 5-field IMRT technique has resulted in improved IMRT dose conformity, homogeneity, and lesser MUs used for radiation therapy. However, this difference was not significant.

Keywords: IMRT, dose conformity, MUs, prostate cancer
Full-Text [PDF 642 kb]   (224 Downloads)    
Type of Study: Reviews and Perspectives | Subject: Radiation Biology
Send email to the article author

Add your comments about this article
Your username or email:

Write the security code in the box >



DOI: 10.18869/acadpub.ijrr.15.2.177


XML     Print


Download citation:
BibTeX | RIS | EndNote | Medlars | ProCite | Reference Manager | RefWorks
Send citation to:

Mahdavi S, Jazayeri Gharehbagh E, Nikoofar A, Mofid B, Vasheghani M, Saedi D. Radiation treatment planning for prostate cancer: A new dosimetric comparison of five and seven fields IMRT plans . IJRR. 2017; 15 (2) :177-183
URL: http://ijrr.com/article-1-1962-en.html
Volume 15, Number 2 (4-2017) Back to browse issues page
International Journal of Radiation Research
Persian site map - English site map - Created in 0.052 seconds with 807 queries by yektaweb 3505