28 May 1999 X-ray phase-contrast imaging study of soft tissue and bone samples
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Abstract
Conventional radiography is based on absorption contrast and geometrical (ray) optics. After an outline of the relevant theory, this article reports results displaying both phase- and absorption-contrast, collected with a technique which utilizes a micro-focus x-ray source to achieve a high degree of spatial coherence, and relatively large object-to-image distances to enable (wave) interference effects (Fresnel diffraction) to occur and manifest themselves as phase contrast in the image plane. Both soft tissue (chicken knee) and hard tissue (finger bone) samples are investigated for a range of source sizes and object-to-image distances, encompassing conditions somewhat analogous to conventional radiography. Variation in image contrast and resolution as a function of these variables is observed and discussed.
© (1999) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Dachao Gao, Dachao Gao, Andrew Pogany, Andrew Pogany, Andrew Wesley Stevenson, Andrew Wesley Stevenson, Timur E. Gureyev, Timur E. Gureyev, Stephen W. Wilkins, Stephen W. Wilkins, } "X-ray phase-contrast imaging study of soft tissue and bone samples", Proc. SPIE 3659, Medical Imaging 1999: Physics of Medical Imaging, (28 May 1999); doi: 10.1117/12.349509; https://doi.org/10.1117/12.349509
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