dosimetric comparison between intensity modulated radiotherapy and three dimensional conformal radiotherapy planning in patients with locally advanced cervical carcinoma
نویسندگان
چکیده
background: external beam radiotherapy (ebrt) is mainstay of treatment in patients with locally advanced cervical carcinoma (lacc). three dimensional conformal radiotherapy (3dcrt) and intensity modulated radiotherapy (imrt) are mainly used in ebrt. however which one is superior is still controversial. materials and methods: forty patients of lacc treated with imrt were selected for this study. 3dcrt plans were also created for all the patients. 3dcrt and imrt plans were compared on the basis of planning target volume (ptv) coverage, dose to normal organs, homogeneity index (hi) and conformity index (ci95%). results: in both the techniques 99% of ptv was covered with more than 96% of prescribed dose (pd). d15, d35 and d50 (dose to 15%, 35% and 50% volume respectively) for bladder was reduced by 2.09%, 14.623% and 32.57% and for the rectum it was reduced by 7.46% ,23.82% and 43.68% in imrt compared to 3dcrt. v45 (volume receiving 45 gy) in case of bowel were found to be much less in imrt in comparison to 3dcrt. insignificant difference found between doses to femoral heads in imrt and 3dcrt. the ci95% in imrt plans was found much better than that in 3dcrt whereas hi in both the techniques were found almost same. conclusion: imrt significantly reduced the irradiated volume of oar and improved dose conformity in the ptv compared to that by 3dcrt. so, it can be concluded that imrt should be chosen as preferred technique for the ebrt of lacc with proper immobilizing devices and imaging.
منابع مشابه
Dosimetric comparison between intensity modulated radiotherapy and three dimensional conformal radiotherapy planning in patients with locally advanced cervical carcinoma
Background: External beam radiotherapy (EBRT) is mainstay of treatment in patients with locally advanced cervical carcinoma (LACC). Three dimensional conformal radiotherapy (3DCRT) and intensity modulated radiotherapy (IMRT) are mainly used in EBRT. However which one is superior is still controversial. Materials and Methods: Forty patients of LACC treated with IMRT were selected for this study....
متن کامل3-Dimensional conformal radiotherapy versus intensity modulated radiotherapy for localized prostate cancer: Dosimetric and radiobiologic analysis
Background: To analyze the dosimetric and radio biologic advantages between intensity modulated radiotherapy (IMRT) and 3 dimensional conformal radiotherapy (3DCRT) and selection of optimal photon energy for IMRT treatments. Material and methods: 24 patients with localized prostate carcinoma were planned for 3DCRT and IMRT techniques. Radiation dose of 54 Gy with 2 Gy/fraction, was planned to ...
متن کامل3-dimensional conformal radiotherapy versus intensity modulated radiotherapy for localized prostate cancer: dosimetric and radiobiologic analysis
background: to analyze the dosimetric and radio biologic advantages between intensity modulated radiotherapy (imrt) and 3 dimensional conformal radiotherapy (3dcrt) and selection of optimal photon energy for imrt treatments. material and methods: 24 patients with localized prostate carcinoma were planned for 3dcrt and imrt techniques. radiation dose of 54 gy with 2 gy/fraction, was planned to p...
متن کاملVolumetric-modulated arc radiotherapy for pancreatic malignancies: dosimetric comparison with sliding-window intensity-modulated radiotherapy and 3-dimensional conformal radiotherapy.
Volumetric-modulated arc radiotherapy (VMAT) is an iteration of intensity-modulated radiotherapy (IMRT), both of which deliver highly conformal dose distributions. Studies have shown the superiority of VMAT and IMRT in comparison with 3-dimensional conformal radiotherapy (3D-CRT) in planning target volume (PTV) coverage and organs-at-risk (OARs) sparing. This is the first study examining the be...
متن کاملComparison of Volumetric Modulated Arc Therapy and Three-Dimensional Conformal Radiotherapy in Postoperative High-Grade Glioma: A Dosimetric Comparison
Introduction: We aimed to dosimetrically compare three-dimensional conformal radiotherapy (3D-CRT) and volumetric modulated arc therapy (VMAT) in terms of planning target volume (PTV) coverage, organ at risk (OAR) sparing, and conformity index (CI). Material and Methods: Planning data of 26 high grade glioma (HGG) patients were used. Prescrib...
متن کاملDosimetric Comparison between Intensity Modulated Radiotherapy and 3 Dimensional Conformal Radiotherapy in the Treatment of Rectal Cancer
Objective: To compare dosimetric parameters of 3 dimensional conformal radiotherapy (3 DCRT) and intensity modulated radiotherapy (IMRT) in terms of target coverage and doses to organs at risk (OAR) in the management of rectal carcinoma. Methods: In this prospective study, conducted between August 2014 and March 2016, all patients underwent CT simulation along with a bladder protocol and target...
متن کاملمنابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
iranian journal of radiation researchجلد ۱۴، شماره ۳، صفحات ۱۸۹-۱۹۶
میزبانی شده توسط پلتفرم ابری doprax.com
copyright © 2015-2023