ArticleThe British journal of radiology2021
CBCT imaging: a simple approach for optimising and evaluating concomitant imaging doses, based on patient-specific attenuation, during radiotherapy pelvis treatment.
Article in The British journal of radiology, 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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Who cites it
11 citing papers in PubMed.
- A Hybrid Sparse Primary Sampling (SPS) Strategy for CBCT.IEEE transactions on bio-medical engineering · 2026Article
- Multi-institutional validation of hypersight CBCT-based dose calculation on O-ring linacs.Journal of applied clinical medical physics · 2026Article
- Development of a patient-specific cone-beam computed tomography dose optimization model using machine learning in image-guided radiation therapy.Radiological physics and technology · 2025Article
- Treatment efficiency and quality improvement via double imaging modality (DIM) versus single imaging modality (SIM) image-guided radiotherapy for prostate cancer.Technical innovations & patient support in radiation oncology · 2025Article
- Estimation of organ and effective doses of CBCT scans of radiotherapy using size-specific field of view (FOV): a Monte Carlo study.Physical and engineering sciences in medicine · 2024Article
- Minimum imaging dose for deep learning-based pelvic synthetic computed tomography generation from cone beam images.Physics and imaging in radiation oncology · 2024Article
- Implementation of a comprehensive set of optimised CBCT protocols and validation through imaging quality and dose audit.The British journal of radiology · 2022Article
- Evaluation of a new acrylic-lead shielding device for peripheral dose reduction during cone-beam computed tomography.BJR open · 2022Article
- Evaluation of In-room Volumetric Imaging Doses for Image-guided Radiotherapy: A Multi-institutional Study.Journal of medical physicsArticle
- Measurement of Imaging Dose in 2D kV Image Guided Radiotherapy Using Indigenously Developed Portable Free Air Ionization Chamber.Journal of medical physicsArticle
- Effect of Body Mass Factors on Setup Displacement in Gynecologic Tumors and Subsequent Effect on PTV Margins.Advances in radiation oncologyArticle
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4 authors.
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Abstract
objectivesA simple, robust method, for optimising cone-beam CT (CBCT) dose and image quality for pelvis treatment, based on patient-specific attenuation.
methodsMethods were investigated for grouping patients into four imaging categories (small [S], medium [M], large [L], extra large [XL]), based on planning-CT CTDIvol, and phantoms constructed to represent each group. CBCTs with varying kV, mA and ms honed in on the best settings, with a bladder noise of 25 HU. A patient pilot study clinically verified the new imaging settings.
resultsThe planning CTDIvol is a reliable method for grouping patients. Phantom measurements from the S, M and L groups show doses significantly reduced (19-83% reduction), whilst the XL group required an increase of 39%. Phantom TLD measurements showed the number of scans needed to increase rectal organ at risk (OAR) dose by 1 Gy was 143 (S group) and 50 (M group). Images were qualitatively assessed as sufficient by clinicians.
conclusionPatient-specific CBCT modes are in use clinically with dose reductions across all modes except Pelvis XL, keeping doses ALARP and images optimal. Consideration of OAR doses controls the number of CBCTs allowed to ensure adherence to OAR tolerance. Reporting CBCT doses in "scans per Gray" allows clinicians to make informed decisions regarding the imaging schedule and concomitant doses. ADVANCES IN KNOWLEDGE: Patient grouping at planning CT, using CTDIvol, allows for CBCT imaging protocols to be selected based on patient specific attenuation. Reporting OAR doses in terms of "scans per Gray" allows translation of imaging dose risk to the Oncologist.
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