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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 1:33 |
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Conference: Bucharest University Faculty of Physics 2013 Meeting
Section: Biophysics; Medical Physics
Title:
Volumetric intensity modulated arc therapy vs. three-dimensional conformal radiation therapy plans in head-and-neck cancer: a comparative planning and dosimetric study
Authors:
Popa Raducu (1,2), Suditu Mihai (1,2), Adam Daniela (2), Ciocaltei Violeta (2), Duliu G. Octavian (1)
Affiliation:
(1)Faculty of Physics, University of Bucharest
(2)Private Clinic for Radiotherapy, Amethyst Otopeni
E-mail
raducupopa27@yahoo.com
Keywords:
VMAT, 3D-CRT, Planning dosimetry, Head-and-neck cancer.
Abstract:
Purpose: This study was undertaken in order to compare dosimetric parameters of volumetric intensity modulated arc therapy (VMAT) with three dimensional conformal radiation therapy (3D-CRT) plans for oropharingeal cancer patients.
Materials and Methods: We included in this study 15 patients with advanced tumors of oropharinx who had been treated in our clinic. Treatment plans were performed on a Pinnacle 3, version 9.4 (Philips Medical Systems, Markham, Ontario) system using beam data, 6 MV, generated for Elekta Synergy linear accelerator. Calculated doses to planning target volume (PTV) and organs at risk (OAR) were compared between VMAT and 3D-CRT plans. Results: The evaluation of dosimetric parameters showed a significant difference between treatment techniques, especially for organs at risk where the doses received are higher with the 3D technique in comparison with the VMAT technique. Also, VMAT increases the conformity index and the minimum dose to target volumes compared with 3D-CRT in patients having this type of cancer. Conclusion: The study confirms that VMAT is superior to 3D-CRT in the treatment of oropharyngeal cancer.
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