Fast protocol for radiochromic film dosimetry using a cloud computing web application |
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| Affiliation: | 1. Nuclear Medicine Department, Hôpital Européen Georges Pompidou (HEGP), 75015 Paris, France;2. Laboratoire d’Evaluation de la Dose Interne (LEDI), Institut de Radioprotection et de Sûreté Nucléaire (IRSN), 92262 Fontenay-Aux-Roses, France;3. Department of Radiology, Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA;1. Medical Physics Department, Veneto Institute of Oncology IOV – IRCCS, Via Gattamelata 64, 35128 Padova, Italy;2. University of Turin, Department of Oncology, Turin, Italy;3. School of Bioengineering and Medical-surgical Sciences, Politecnico di Torino, Corso Bramante, 88, 10126 Torino, Italy;4. University Hospital “Maggiore della Carità”, Department of Medical Physics, Corso Giuseppe Mazzini, 18, 28100 Novara, Italy;5. Tecnologie Avanzate, Lungo Dora Voghera, 36, 10153 Torino, Italy;1. Medical Physics Unit, McGill University, Montreal, QC H4A 3J1, Canada;2. Metrology Research Centre, National Research Council, Ottawa, ON K1A 0R6, Canada;3. Department of Radiation Oncology, University of Michigan, Ann Arbor, MI 48103-4943, USA;4. Department of Radiation Oncology, Duke University, Durham, NC 27710, USA;1. Department of Radiation Oncology, Aichi Cancer Center Hospital, 1-1 Kanokoden, Chikusa-Ku, Nagoya, Aichi 464-8681, Japan;2. Graduate School of Radiological Technology, Gunma Prefectural College of Health Sciences, 323-1 Kamioki, Maebashi, Gunma 371-0052, Japan;3. Graduate School of Medicine, Aichi Medical University, 1-1 Yazako-karimata, Nagakute, Aichi 480 1195, Japan;1. Centre Léon Bérard, 28 rue Laennec, 69373 LYON Cedex 08, France;2. CREATIS, CNRS UMR5220, Inserm U1044, INSA-Lyon, Université Lyon 1, Villeurbanne, France;3. MedEuropa, Strada Turnului 8, Brașov 500152, Romania |
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| Abstract: | PurposeTo investigate the feasibility of a fast protocol for radiochromic film dosimetry to verify intensity-modulated radiotherapy (IMRT) plans.Method and materialsEBT3 film dosimetry was conducted in this study using the triple-channel method implemented in the cloud computing application (Radiochromic.com). We described a fast protocol for radiochromic film dosimetry to obtain measurement results within 1 h.Ten IMRT plans were delivered to evaluate the feasibility of the fast protocol. The dose distribution of the verification film was derived at 15, 30, 45 min using the fast protocol and also at 24 h after completing the irradiation. The four dose maps obtained per plan were compared using global and local gamma index (5%/3 mm) with the calculated one by the treatment planning system. Gamma passing rates obtained for 15, 30 and 45 min post-exposure were compared with those obtained after 24 h.ResultsSmall differences respect to the 24 h protocol were found in the gamma passing rates obtained for films digitized at 15 min (global: 99.6% ± 0.9% vs. 99.7% ± 0.5%; local: 96.3% ± 3.4% vs. 96.3% ± 3.8%), at 30 min (global: 99.5% ± 0.9% vs. 99.7% ± 0.5%; local: 96.5% ± 3.2% vs. 96.3 ± 3.8%) and at 45 min (global: 99.2% ± 1.5% vs. 99.7% ± 0.5%; local: 96.1% ± 3.8% vs. 96.3 ± 3.8%).ConclusionsThe fast protocol permits dosimetric results within 1 h when IMRT plans are verified, with similar results as those reported by the standard 24 h protocol. |
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| Keywords: | Radiochromic Film dosimetry IMRT |
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