ArticlePhysics and imaging in radiation oncology2024
A commissioning protocol for portal imaging-based radiotherapy in vivo dosimetry systems.
Article in Physics and imaging in radiation oncology, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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Who cites it
4 citing papers in PubMed.
- Improving patient treatment accuracy using transit dosimetry with Electronic Portal Imaging Device images and deep learning.Physics and imaging in radiation oncology · 2026Article
- In-vivo dosimetry using electronic portal imaging in online-adaptive radiotherapy for rectal cancer.Physics and imaging in radiation oncology · 2026Article
- Characterization of a novel large-area electronic portal imaging device system for a ring-shaped HalosTx linear accelerator in radiotherapy quality assurance.Quantitative imaging in medicine and surgery · 2026Article
- Detection of the failed-tolerance causes of electronic-portal-imaging-device-basedPhysics and imaging in radiation oncology · 2025Article
Corrections and comments
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Authors and funding
11 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Background and Purpose: With the availability of commercial electronic portal imaging detector-based in vivo dosimetry (EPID-based IVD) solutions, many radiotherapy departments are adopting this technology. However, comprehensive commissioning guidance is lacking. This study aims to provide a protocol for testing the accuracy and sensitivity of EPID-based IVD systems. Material and methods: The protocol was tested across four institutions using two different systems. Accuracy was evaluated with homogeneous slab phantoms using different square regular fields, and clinical plans in a CIRS lung phantom. Multiple forward and back-projected algorithm implementations were assessed for different energies. Sensitivity analysis in the lung phantom examined responses to setup errors, anatomical variations, and delivery errors. Results: In homogeneous phantoms, over 85 % of pixels passed the 5 %/2mm gamma criteria, except for the 2x2 cm Conclusion: We successfully developed a protocol to commission EPID IDV systems. It was found that not all systems and implementations achieved satisfactory accuracy and sensitivity, emphasising the need for thorough commissioning and benchmarking.
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