| Autor: |
Maya Shariff, Johanna Grigo, Siti Masitho, Tobias Brandt, Alexander Weiss, Ulrike Lambrecht, Willi Stillkrieg, Michael Lotter, Florian Putz, Rainer Fietkau, Christoph Bert |
| Jazyk: |
angličtina |
| Rok vydání: |
2024 |
| Předmět: |
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| Zdroj: |
Zeitschrift für Medizinische Physik, Vol 34, Iss 3, Pp 477-484 (2024) |
| Druh dokumentu: |
article |
| ISSN: |
0939-3889 |
| DOI: |
10.1016/j.zemedi.2022.11.006 |
| Popis: |
Purpose: A new insert for a commercially available end-to-end test phantom was designed and in-house manufactured by 3D printing. Subsequently, the insert was tested for different stereotactic radiation therapy workflows (SRS, SBRT, FSRT, and Multimet) also in comparison to the original insert. Material and methods: Workflows contained imaging (MR, CT), treatment planning, positioning, and irradiation. Positioning accuracy was evaluated for non-coplanar x-ray, kV- and MV-CBCT systems, as well as surface guided radiation therapy. Dosimetric accuracy of the irradiation was measured with an ionization chamber at four different linear accelerators including dynamic tumor tracking for SBRT. Results: CT parameters of the insert were within the specification. For MR images, the new insert allowed quantitative analysis of the MR distortion. Positioning accuracy of the phantom with the new insert using the imaging systems of the different linacs was < 1 mm/degree also for MV-CBCT and a non-coplanar imaging system which caused > 3 mm deviation with the original insert. Deviation of point dose values was |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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Full Text from ScienceDirect