Evaluation of treatment plan quality for head and neck IMRT: a multicenter study

Hizam, Diyana Afrina and Jong, Wei Loong and Zin, Hafiz Mohd and Ng, Kwan Hoong and Ung, Ngie Min (2021) Evaluation of treatment plan quality for head and neck IMRT: a multicenter study. Medical Dosimetry, 46 (3). pp. 310-317. ISSN 0958-3947, DOI https://doi.org/10.1016/j.meddos.2021.03.003.

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Intensity-modulated radiotherapy (IMRT) treatment planning for head and neck cancer is challenging and complex due to many organs at risk (OAR) in this region. The experience and skills of planners may result in substantial variability of treatment plan quality. This study assessed the performance of IMRT planning in Malaysia and observed plan quality variation among participating centers. The computed tomography dataset containing contoured target volumes and OAR was provided to participating centers. This is to control variations in contouring the target volumes and OARs by oncologists. The planner at each center was instructed to complete the treatment plan based on clinical practice with a given prescription, and the plan was analyzed against the planning goals provided. The quality of completed treatment plans was analyzed using the plan quality index (PQI), in which a score of 0 indicated that all dose objectives and constraints were achieved. A total of 23 plans were received from all participating centers comprising 14 VMAT, 7 IMRT, and 2 tomotherapy plans. The PQI indexes of these plans ranged from 0 to 0.65, indicating a wide variation of plan quality nationwide. Results also reported 5 out of 21 plans achieved all dose objectives and constraints showing more professional training is needed for planners in Malaysia. Understanding of treatment planning system and computational physics could also help in improving the quality of treatment plans for IMRT delivery. (C) 2021 American Association of Medical Dosimetrists. Published by Elsevier Inc. All rights reserved.

Item Type: Article
Funders: Malaysian Oncological Society (PV030-2018), University of Malaya RU grant (RF005C-2018), Malaysian Oncological Society (MOS), Universiti Malaya
Uncontrolled Keywords: IMRT/VMAT audit; Plan quality; Plan complexity; Treatment planning; Dose distribution
Subjects: R Medicine > R Medicine (General)
R Medicine > RC Internal medicine > RC0254 Neoplasms. Tumors. Oncology (including Cancer)
Divisions: Faculty of Medicine
Depositing User: Ms Zaharah Ramly
Date Deposited: 08 Apr 2022 04:12
Last Modified: 08 Apr 2022 04:12
URI: http://eprints.um.edu.my/id/eprint/27868

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