Correction for spectral artifacts in cross-sectional reconstruction from x rays.
A monoenergetic response correction is described which, along with adequate filtration, may be used to remove the spectral shift artifact encountered in three-dimensional reconstruction from x rays. Reconstructions were carried out by means of a convolution algorithm for simulated data using this method. These are compared with reconstructions obtained using fixed-length water-bath scans as a remedy for the special artifact. These studies suggest that the spectral artifact can be successfully eliminated from computerized cross-sectional scans without resorting to the use of the water bath while, at the same time, improving quantum statistics and/or permitting operation at a lower tube current.
D005374:Filtration; D008962:Models, Theoretical; D055585:Physical Phenomena; D010825:Physics; D013057:Spectrum Analysis; D014057:Tomography, X-Ray Computed / Q000295:instrumentation* / Q000592:standards; D014867:Water; D014965:X-Rays
D014867:Water