دورية أكاديمية
Towards mid-position based Stereotactic Body Radiation Therapy using online magnetic resonance imaging guidance for central lung tumours
| العنوان: | Towards mid-position based Stereotactic Body Radiation Therapy using online magnetic resonance imaging guidance for central lung tumours |
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| المؤلفون: | Hans Ligtenberg, Sara L. Hackett, Laura G. Merckel, Louk Snoeren, Charis Kontaxis, Cornel Zachiu, Gijsbert H. Bol, Joost J.C. Verhoeff, Martin F. Fast |
| المصدر: | Physics and Imaging in Radiation Oncology, Vol 23, Iss , Pp 24-31 (2022) |
| بيانات النشر: | Elsevier, 2022. |
| سنة النشر: | 2022 |
| المجموعة: | LCC:Medical physics. Medical radiology. Nuclear medicine LCC:Neoplasms. Tumors. Oncology. Including cancer and carcinogens |
| مصطلحات موضوعية: | MR-Linac, Mid-position planning, Dose accumulation, MRgRT, NSCLC, Medical physics. Medical radiology. Nuclear medicine, R895-920, Neoplasms. Tumors. Oncology. Including cancer and carcinogens, RC254-282 |
| الوصف: | Background and purpose: Central lung tumours can be treated by magnetic resonance (MR)-guided radiotherapy. Complications might be reduced by decreasing the Planning Target Volume (PTV) using mid-position (midP)-based planning instead of Internal Target Volume (ITV)-based planning. In this study, we aimed to verify a method to automatically derive patient-specific PTV margins for midP-based planning, and show dosimetric robustness of midP-based planning for a 1.5T MR-linac.Materials and methods: Central(n = 12) and peripheral(n = 4) central lung tumour cases who received 8x7.5 Gy were included. A midP-image was reconstructed from ten phases of the 4D-Computed Tomography using deformable image registration. The Gross Tumor Volume (GTV) was delineated on the midP-image and the PTV margin was automatically calculated based on van Herk’s margin recipe, treating the standard deviation of all Deformation Vector Fields, within the GTV, as random error component. Dosimetric robustness of midP-based planning for MR-linac using automatically derived margins was verified by 4D dose-accumulation. MidP-based plans were compared to ITV-based plans. Automatically derived margins were verified with manually derived margins.Results: The mean D95% target coverage in GTV + 2 mm was 59.9 Gy and 62.0 Gy for midP- and ITV-based central lung plans, respectively. The mean lung dose was significantly lower for midP-based treatment plans (difference:-0.3 Gy; p |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 2405-6316 |
| العلاقة: | http://www.sciencedirect.com/science/article/pii/S2405631622000422Test; https://doaj.org/toc/2405-6316Test |
| DOI: | 10.1016/j.phro.2022.05.002 |
| الوصول الحر: | https://doaj.org/article/f4dd142a7f6841a38f142e7a201ef7b8Test |
| رقم الانضمام: | edsdoj.f4dd142a7f6841a38f142e7a201ef7b8 |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 24056316 |
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| DOI: | 10.1016/j.phro.2022.05.002 |