Brennan PC

Gureyev TE

Pavlov, Konstantin

Reynolds JM

UC Research Repository

A Comparison of Different Approaches to Image Quality Assessment in Phase-Contrast Mammography Jesse M. Reynolds1, Patrick C. Brennan2, Timur E. Gureyev2,3,4,5, Konstantin M. Pavlov1,4,5 1 School of Physical and Chemical Sciences, University of Canterbury, Christchurch 8041, New Zealand 2 Faculty of Health Sciences, The University of Sydney, Lidcombe 2141, Australia 3 School of Physics, The University of Melbourne, Parkville 3010, Australia 4 School of Physics and Astronomy, Monash University, Clayton 3800, Australia 5 School of Science and Technology, University of New England, Armidale 2351, Australia Propagation-based phase-contrast computed tomography (PB-CT) has the potential to improve breast cancer detection and characterisation compared to established mammography techniques. The aim of this work is to find a quantitative image quality metric which could accurately predict the subjective clinical image quality assessment of PB-CT images made by radiologists as described in Taba et al. [1]. The experimental data analysed in this study included PB-CT scans, which were obtained for 12 full intact mastectomy samples at Imaging and Medical beamline (IMBL) of the Australian Synchrotron at different monochromatic X-ray energies and clinically relevant radiation doses. Quantitative image quality metrics, including visibility, signal to noise ratio (SNR), and spatial resolution, were calculated for all PB-CT and conventional CT image sets using the open-source 3D Slicer (https://www.slicer.org/) software. For each metric, an objective image quality “score” was generated to match the subjective scoring provided by the radiologists. Weighting factors were then applied to the scores and a weighted contrast to noise to resolution (CNR/res) score was calculated. The unscaled contrast and spatial resolution scores were both found to have a significant correlation with the radiologists’ scores with R values of 0.9223 and 0.8360 respectively, while SNR had an insignificant correlation, with an R value of -0.6785. The weighted CNR/res score showed a significant correlation to the radiologists’ scores with an R value of 0.9681. [1] S. T. Taba et al., Academic radiology 28.1 (2021): e20-e26. 

A Comparison of Different Approaches to Image Quality Assessment in Phase-Contrast Mammography

https://ir.canterbury.ac.nz/bitstream/10092/104169/2/AUM2021%20-%20Abstract%20Rev%203%20sent.pdf

A Comparison of Different Approaches to Image Quality Assessment in Phase-Contrast Mammography

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