Polychromatic phase-contrast computed tomography.
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.
Donnelly
Edwin F
EF
Department of Radiology and Radiological Sciences, Vanderbilt University Medical Center, Nashville, Tennessee 37232, USA. edwin.donnelly@vanderbilt.edu
Price
Ronald R
RR
Lewis
Kenneth G
KG
Pickens
David R
DR
D000465:Algorithms; D004867:Equipment Design; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods; D008899:Mineral Oil; D008962:Models, Theoretical; D019047:Phantoms, Imaging; D019904:Polymethyl Methacrylate; D011857:Radiographic Image Interpretation, Computer-Assisted / Q000379:methods*; D011859:Radiography / Q000379:methods; D015203:Reproducibility of Results; D013997:Time Factors; D014057:Tomography, X-Ray Computed / Q000379:methods*; D014965:X-Rays
D008899:Mineral Oil; D019904:Polymethyl Methacrylate