Total-body irradiation using linac-based volumetric modulated arc therapy: Its clinical accuracy, feasibility and reliability.

Détails

ID Serval
serval:BIB_17DAF1080FC2
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Total-body irradiation using linac-based volumetric modulated arc therapy: Its clinical accuracy, feasibility and reliability.
Périodique
Radiotherapy and oncology
Auteur(s)
Tas B., Durmus I.F., Okumus A., Uzel O.E., Gokce M., Goksoy H.S., Ozsahin E.M.
ISSN
1879-0887 (Electronic)
ISSN-L
0167-8140
Statut éditorial
Publié
Date de publication
12/2018
Peer-reviewed
Oui
Volume
129
Numéro
3
Pages
527-533
Langue
anglais
Notes
Publication types: Journal Article
Publication Status: ppublish
Résumé
To report the feasibility, accuracy, and reliability of volumetric modulated arc therapy (VMAT)-based total-body irradiation (TBI) treatment in patients with acute myeloid leukemia (AML) or acute lymphoblastic leukemia (ALL).
From 2015 to 2018, 30 patients with AML or ALL were planned and treated with VMAT-based TBI, which consisted of three isocenters and three overlapping arcs. TBI dose was prescribed to 90% of the planning treatment volume (PTV) receiving 12 Gy in six fractions, at two fractions per day. Mean lung and kidney doses were restricted less than 10 Gy, and maximum lens dose less than 6 Gy. Quality assurance (QA) comprised the verification of the irradiation plans via dose-volume histogram (DVH) based 3D patient QA system.
Average mean lung dose was 9.7 ± 0.2 Gy, mean kidney dose 9.6 ± 0.2 Gy, maximum lens dose 4.5 ± 0.4 Gy, mean PTV dose 12.7 ± 0.1 Gy, and heterogeneity index of PTV was 1.16 ± 0.02 in all patients. Grade 3 or more acute radiation toxicity was not observed. When comparing plan and DVH-based 3D patient QA results, average differences of 3.3% ± 1.3 in mean kidney doses, 1.1% ± 0.7 in mean lung doses, and 0.9% ± 0.4 in mean target doses were observed.
Linac-based VMAT increased the dose homogeneity of TBI treatment more than extended SSD techniques. Partial cone-beam CT and optical surface-guided system assure patient positioning. DVH-based 3D patient dose verification QA was possible with linac-based VMAT showing small differences between planned and delivered doses. It is feasible, accurate, and reliable.
Mots-clé
Adolescent, Adult, Child, Feasibility Studies, Female, Humans, Leukemia, Myeloid, Acute/radiotherapy, Male, Middle Aged, Particle Accelerators, Precursor Cell Lymphoblastic Leukemia-Lymphoma/radiotherapy, Quality Assurance, Health Care, Radiotherapy Dosage, Radiotherapy Planning, Computer-Assisted/methods, Radiotherapy, Intensity-Modulated/methods, Reproducibility of Results, Whole-Body Irradiation/methods, Young Adult, DVH-based 3D patient QA, TBI, VMAT
Pubmed
Web of science
Création de la notice
10/09/2018 14:12
Dernière modification de la notice
28/09/2019 5:08
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