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Polychromatic phase-contrast computed tomography
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DOI：10.1118/1.2750967.png)
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Polychromatic phase-contrast radiography differs from traditional (absorption -only) radiography in that the method requires at least a partially coherent x-ray source and the resulting images contain information about the phase shifts of x-rays in addition to the traditional absorption information. In a typical embodiment, this effect results in a measurable enhancement in image contrast at the edges of objects. In this study, a phase-contrast imaging system was adapted to allow an object to be imaged at multiple projections, and these projections were used to generate phase-contrast computed tomography images. The images obtained with this technique show edge enhancements surrounding the objects within the image. (c) 2007 American Association of Physicists in Medicine.
Keyword:
phase contrast
computed tomography
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3.2
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3.7W
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