ArticleJournal of applied clinical medical physics2023
Verification of patient-setup accuracy using a surface imaging system with steep measurement angle.
Article in Journal of applied clinical medical physics, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed.
- Margins of Planning Target Volume and Set-up Errors based on Megavoltage Cone-Beam CT Image Guided Radiotherapy with Helical Tomotherapy: Importance of Automatic Registration Plus Manual Registration.Journal of biomedical physics & engineering · 2026Article
- Evaluation of the accuracy of a surface-guided radiotherapy system for patient positioning in radiotherapy of breast cancer.Physics and imaging in radiation oncology · 2026Article
- Clinical technique: evaluation of detection accuracy in surface-guided radiation therapy using CT references from different treatment planning systems.Radiological physics and technology · 2025Article
- Enhancing patient positioning precision: a comparative analysis of surface-guided radiation therapy systems.Radiological physics and technology · 2025Article
- Verification of patient-setup accuracy using a surface imaging system with steep measurement angle.Journal of applied clinical medical physics · 2023Article
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Authors and funding
4 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
purposeWe evaluate an SGRT device (Voxelan HEV-600 M/RMS) installed with Radixact, with the view angle of the Voxelan's camera at 74 degrees. The accuracy of Voxelan with this steep angle was evaluated with phantom experiments and inter-fractional setup errors of patients.
methodsIn the phantom experiments, the difference between the measured values of Voxelan from the truth was evaluated for translations and rotations. The inter-fractional setup error between the setup using skin markers with laser localizer (laser setup: LS) and the setup using Voxelan (surface setup: SS) was compared for head and neck (N = 19), chest (N = 7) and pelvis (N = 9) cases. The inter-fractional setup error was calculated by subtracting from bone matching by megavoltage computed tomography (MVCT) as ground truth.
resultsFrom the phantom experiments, the average difference between the measured values of Voxelan from the truth was within 1 mm and 1 degree. In all cases, inter-fractional setup error based on MVCT was not significantly different between LS and SS by Welch's t-test (P > 0.05). The vector offset of the LS for head and neck, chest, and pelvis were 6.5, 9.6, and 9.6 mm, respectively, and that of the SS were 5.8, 8.6, and 12.6 mm, respectively. Slight improvement was observed for the head and neck, and chest cases, however, pelvis cases were not improved because the umbilical region could not be clearly visualized as a reference.
conclusionThe results show that SS in Voxelan with an installation angle of 74 degrees is equal to or better than LS.
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