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Abstract #0712

Image quality assessment and longitudinal quality monitoring of clinically-applied AI-based reconstructions in MRI of rectal cancer

Owen Alun White1,2, Joshua Shur1, Francesca Castagnoli1,2, Geoff Charles-Edwards1,2, Brandon Whitcher1,2, Erica Scurr1, Georgina Hopkinson1, Dow-Mu Koh1,2, and Jessica M Winfield1,2
1MRI Unit, The Royal Marsden NHS Foundation Trust, London, United Kingdom, 2Division of Radiotherapy and Imaging, The Institute of Cancer Research, London, United Kingdom

Synopsis

Keywords: Cancer, Machine Learning/Artificial Intelligence, Image Quality; Quality Control / Quality Assurance; QA/QC; AI/ML image reconstruction

Motivation: With increasing AI adoption in MR-reconstructions, robust quality assessment becomes paramount. This study aims to ensure that AI-techniques meet clinical requirements at implementation and longitudinally.

Goal(s): 1) Compare image quality of AI-imaging with standard techniques in anorectal cancer. 2) Develop longitudinal quality control (QC) assessments capable of detecting changes in AI-reconstructions without resource-intensive evaluations.

Approach: A prospective study involving 40 patients utilised radiologist scoring and quantitative image-quality-metrics (IQMs). Retrospective reconstructions gauged sensitivity of IQMs to reconstruction pipeline changes.

Results: AI-reconstructions demonstrated >50% time savings with improved image quality. Feasibility of quantitative-IQMs for assessing AI-reconstructions is established, providing a practical solution for ongoing QC.

Impact: There is a need to develop QC assessments offering performance monitoring for AI-based reconstructions in diverse clinical settings. The study presents feasible ways to support integration of AI-imaging into clinical practice, including resource-efficient quantitative image quality assessments.

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