ArticleJournal of applied clinical medical physics2021
Commissioning of optical surface imaging systems for cranial frameless stereotactic radiosurgery.
Article in Journal of applied clinical medical physics, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.
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The trial behind it
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Who cites it
11 citing papers in PubMed, 11 citations in OpenAlex.
- Daily quality assurance, system and procedure-specific commissioning of a bore-based optical surface imaging system for surface-guided radiotherapy (SGRT).Journal of applied clinical medical physics · 2026Article
- Tattoo-less chest wall and regional nodal irradiation using surface imaging.Technical innovations & patient support in radiation oncology · 2025Article
- Evaluation of dynamic accuracy and latency of a surface-guided radiotherapy system.Radiological physics and technology · 2025Article
- New findings on clinical experience on surface-guided radiotherapy for frameless non-coplanar stereotactic radiosurgery treatments.Journal of applied clinical medical physics · 2024Article
- Commissioning and clinical evaluation of the IDENTIFYJournal of applied clinical medical physics · 2023Article
- Advances and potential of optical surface imaging in radiotherapy.Physics in medicine and biology · 2022Review
- Analysis of a surface imaging system using a six degree-of-freedom couch.Journal of applied clinical medical physics · 2022Article
- Shift detection discrepancy between ExacTrac Dynamic system and cone-beam computed tomography.Journal of applied clinical medical physics · 2022Article
- A uniform and versatile surface-guided radiotherapy procedure and workflow for high-quality breast deep-inspiration breath-hold treatment in a multi-center institution.Journal of applied clinical medical physics · 2022Article
- Dosimetric Analysis of Intra-Fraction Motion Detected by Surface-Guided Radiation Therapy During Linac Stereotactic Radiosurgery.Advances in radiation oncologyArticle
- Commissioning and Quality Assurance of CatalystJournal of medical physicsArticle
Corrections and comments
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Authors and funding
15 authors at 1 institution in 1 country.
Funding
Abstract
purposeThis study aimed to evaluate and compare different system calibration methods from a large cohort of systems to establish a commissioning procedure for surface-guided frameless cranial stereotactic radiosurgery (SRS) with intrafractional motion monitoring and gating. Using optical surface imaging (OSI) to guide non-coplanar SRS treatments, the determination of OSI couch-angle dependency, baseline drift, and gated-delivered-dose equivalency are essential.
methodsEleven trained physicists evaluated 17 OSI systems at nine clinical centers within our institution. Three calibration methods were examined, including 1-level (2D), 2-level plate (3D) calibration for both surface image reconstruction and isocenter determination, and cube phantom calibration to assess OSI-megavoltage (MV) isocenter concordance. After each calibration, a couch-angle dependency error was measured as the maximum registration error within the couch rotation range. A head phantom was immobilized on the treatment couch and the isocenter was set in the middle of the brain, marked with the room lasers. An on-site reference image was acquired at couch zero, the facial region of interest (ROI) was defined, and static verification images were captured every 10° for 0°-90° and 360°-270°. The baseline drift was assessed with real-time monitoring of the motionless phantom over 20 min. The gated-delivered-dose equivalency was assessed using the electron portal imaging device and gamma test (1%/1mm) in reference to non-gated delivery.
resultsThe maximum couch-angle dependency error occurs in longitudinal and lateral directions and is reduced significantly (P < 0.05) from 1-level (1.3 ± 0.4 mm) to 2-level (0.8 ± 0.3 mm) calibration. The MV cube calibration does not further reduce the couch-angle dependency error (0.8 ± 0.2 mm) on average. The baseline drift error plateaus at 0.3 ± 0.1 mm after 10 min. The gated-delivered-dose equivalency has a >98% gamma-test passing rate.
conclusionA commissioning method is recommended using the 3D plate calibration, which is verified by radiation isocenter and validated with couch-angle dependency, baseline drift, and gated-delivered-dose equivalency tests. This method characterizes OSI uncertainties, ensuring motion-monitoring accuracy for SRS treatments.
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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.