Geometric accuracy in patient positioning for stereotactic radiotherapy of intracranial tumors
نویسندگان
چکیده
Background/PurposeThis study determines and compares the geometric setup errors between stereoscopic x-ray kilo-voltage cone beam CT (CBCT) in phantom tests on a linear accelerator (linac) for image-guided (IG) stereotactic radiotherapy of intracranial tumors. Additionally, dose-volume metrics target volumes CBCT were evaluated.Materials/MethodsA Winston-Lutz- an anthropomorphic used. The mean deviation root square error (RMSE) compared. Dose-volume planning volume (PTV) gross (GTV) calculated.ResultsThe RMSEs with Winston-Lutz-Phantom 0.3 mm, 1.1 mm 0.1 0,1 < translational dimensions (right-left, anterior-posterior superior-inferior). 0.2 x-ray. effects GTV within 1 % all considered dose values. PTV 5 values.ConclusionBoth IG systems provide high accuracy patient positioning submillimeter range. exposed slightly higher than CBCT. comparison other studies similar purpose emphasizes importance individual installation quality assurance.
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ژورنال
عنوان ژورنال: Physics and Imaging in Radiation Oncology
سال: 2023
ISSN: ['2405-6316']
DOI: https://doi.org/10.1016/j.phro.2023.100461