ArticleDiagnostics (Basel, Switzerland)2023
Task-Based Image Quality Assessment Comparing Classical and Iterative Cone Beam CT Images on Halcyon
Article in Diagnostics (Basel, Switzerland), 2023. 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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4 citing papers in PubMed.
- Task-based image quality and dosimetric validation of HyperSight CBCT for adaptive radiotherapy.Journal of applied clinical medical physics · 2026Article
- Assessment of TrueBeam kV Cone-Beam CT Image Quality and the Clinical Impact of Calibration Drift.Asian Pacific journal of cancer prevention : APJCP · 2025Article
- Evaluation of image quality in mobile cone-beam CT with dose modulation using automatic exposure control: A phantom study.Journal of applied clinical medical physics · 2025Article
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5 authors.
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Abstract
backgroundDespite the development of iterative reconstruction (IR) in diagnostic imaging, CBCT are generally reconstructed with filtered back projection (FBP) in radiotherapy. Varian medical systems, recently released with their latest Halcyon PURPOSE: To assess the image quality of radiotherapy CBCT images reconstructed with FBP and an IR algorithm.
methodsThree CBCT acquisition modes (head, thorax and pelvis large) available on a Halcyon
resultsThe noise magnitude and the spatial frequency of the NPS peak was lower with IR than with FBP for all modes. For all low and high-contrast inserts, the values for TTF at 50% were higher with IR than with FBP. For all inserts and all modes, the contrast values were similar with FBP and IR. For all low and high-contrast simulated lesions, d' values were higher with IR than with FBP for all modes. These results were also found on the 6 patients where the images were less noisy but smoother with IR-CBCT.
conclusionsUsing the IR algorithm for CBCT images in radiotherapy improve image quality and thus could increase the accuracy of online registration and limit positioning errors during processing.
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