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Coded-aperture system for planar imaging of volumetric sources

  • US 6,392,235 B1
  • Filed: 02/15/2000
  • Issued: 05/21/2002
  • Est. Priority Date: 02/22/1999
  • Status: Expired due to Term
First Claim
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1. A method of reconstructing a two-dimensional image produced by a collimator using a coded-aperture system wherein a photon flux from an object is received by a detector after passing through a coded aperture, comprising the following steps:

  • (a) recording a plurality of detector measurements of said photon flux, wherein at least some of the measurements are taken varying a spacing between the coded aperture and the detector;

    (b) calculating a volumetric distribution of the photon flux from the object on the basis of said plurality of detector measurements; and

    (c) integrating the photon flux from the object over parallel cylindrical projections of said coded aperture through the object using the volumetric distribution calculated in step (b).

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