Journal article
Dark-field signal extraction in propagation-based phase-contrast imaging
TE Gureyev, DM Paganin, B Arhatari, ST Taba, S Lewis, PC Brennan, HM Quiney
Physics in Medicine and Biology | IOP PUBLISHING LTD | Published : 2020
Abstract
A method for extracting the dark-field signal in propagation-based phase-contrast imaging is proposed. In the case of objects consisting predominantly of a single material, or several different materials with similar ratios of the real decrement to the imaginary part of the complex refractive index, the proposed method requires a single image for extraction of the dark-field signal in two-dimensional projection imaging. In the case of three-dimensional tomographic imaging, the method needs only one image to be collected at each projection angle. Initial examples using simulated and experimental data indicate that this method can improve visualization of small sharp features inside a larger o..
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Awarded by Australian National Breast Cancer Foundation
Awarded by National Health and Medical Research Council (NHMRC), Australia
Funding Acknowledgements
The experimental part of this research was undertaken on the Imaging and Medical beamline at the Australian Synchrotron, part of ANSTO. The following funding is acknowledged: Australian National Breast Cancer Foundation (Grant No. IN-16-001), and Project Grant APP1138283 from the National Health and Medical Research Council (NHMRC), Australia. We acknowledge the support of Drs J Fox, B Kumar and Z Prodanovic of Monash University in providing the mastectomy samples for this study. The authors are also grateful to Dr. A Aminzadeh for help with acquiring and processing the experimental images used in figure 4.