Dosimetric and geometric end-to-end accuracy of a magnetic resonance guided linear accelerator

Physics and Imaging in Radiation Oncology

Nicolaus Andratschke¹  Luisa S. Stark²  Thomas Rudolf³  Marta Bogowicz³  Lotte Wilke³  Jérôme Krayenbühl³  Diem Vuong³  Zaira Girbau Garcia³  Mariangela Zamburlini³  Michael Baumgartl³  Matthias Guckenberger³  Madalyne Chamberlain³  Stefanie Ehrbar³  Riccardo Dal Bello³  Bertrand Pouymayou³  Stephanie Tanadini-Lang³ 

[1] University Hospital Zürich, Department of Radiation Oncology, Zurich, Switzerland;Corresponding author at: Radiation Oncology, University Hospital Zürich, Rämistrasse 100, CH-8091 Zürich, Switzerland.;University Hospital Zürich, Department of Radiation Oncology, Zurich, Switzerland;

关键词: MR-Linac;    Treatment adaption;    Gating;    End-to-end test;   

DOI  :  

来源: DOAJ

【 摘 要 】

The introduction of real-time imaging by magnetic resonance guided linear accelerators (MR-Linacs) enabled adaptive treatments and gating on the tumor position. Different end-to-end tests monitored the accuracy of our MR-Linac during the first year of clinical operation. We report on the stability of these tests covering a static, adaptive and gating workflow. Film measurements showed gamma passing rates of 96.4% ± 3.4% for the static tests (five measurements) and for the two adaptive tests 98.9% and 99.99%, respectively (criterion 2%/2mm). The gated point dose measurements in the breathing phantom were 2.7% lower than in the static phantom.

【 授权许可】

Unknown