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Dosimetric comparison of coplanar and non-coplanar volumetric-modulated arc therapy in head and neck cancer treated with radiotherapy.
| Content Provider | Europe PMC |
|---|---|
| Author | Gayen, Sanjib Kombathula, Sri Harsha Manna, Sumanta Varshney, Sonal Pareek, Puneet |
| Copyright Year | 2020 |
| Abstract | PurposeTo evaluate the dosimetric variations in patients of head and neck cancer treated with definitive or adjuvant radiotherapy using optimized non-coplanar (ncVMAT) beams with coplanar (cVMAT) beams using volumetric arc therapy.Materials and MethodsTwenty-two patients of head and neck cancer that had received radiotherapy using VMAT in our department were retrospectively analyzed. Each of the patients was planned using coplanar and non-coplanar orientations using an optimized couch angle and fluences. We analyzed the Conformity Index (CIRTOG), Dose Homogeneity Index (DHI), Heterogeneity Index (HIRTOG), low dose volume, target and organs-at-risk coverage in both the plans without changing planning optimization parameters. ResultsThe prescription dose ranged from 60 Gy to 70 Gy. Using ncVMAT, CIRTOG, DHI and HIRTOG, and tumor coverage (ID95%) had improved, low dose spillage volume in the body V5Gy was increased and V10Gy was reduced. Integral dose and intensity-modulated radiation therapy factor had increased in ncVMAT. In the case of non-coplanar beam arrangements, maximum dose (Dmax) of right and left humeral head were reduced significantly whereas apex of the right and left lung mean dose were increased.ConclusionThe use of ncVMAT produced better target coverage and sparing of the shoulder and soft tissue of the neck as well as the critical organ compared with the cVMAT in patients of head and neck malignancy. |
| Related Links | https://europepmc.org/backend/ptpmcrender.fcgi?accid=PMC7533406&blobtype=pdf |
| ISSN | 22341900 |
| Journal | Radiation Oncology Journal [Radiat Oncol J] |
| Volume Number | 38 |
| DOI | 10.3857/roj.2020.00143 |
| PubMed Central reference number | PMC7533406 |
| Issue Number | 2 |
| PubMed reference number | 33012157 |
| e-ISSN | 22343164 |
| Language | English |
| Publisher | The Korean Society for Radiation Oncology |
| Publisher Date | 2020-05-26 |
| Access Restriction | Open |
| Rights License | This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. Copyright © 2020 The Korean Society for Radiation Oncology |
| Subject Keyword | Head and neck neoplasm Intensity-modulated radiotherapy |
| Content Type | Text |
| Resource Type | Article |
| Subject | Radiology, Nuclear Medicine and Imaging Oncology |
