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Projector/backprojector with slice-to-slice blurring for efficient 3D scatter modeling

  • US 6,381,349 B1
  • Filed: 11/10/1998
  • Issued: 04/30/2002
  • Est. Priority Date: 11/12/1997
  • Status: Expired due to Fees
First Claim
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1. A method of modeling 3D first-order scatter, non-uniform attenuation, and 3D system geometric point response in an ML-EM algorithm to reconstruction SPECT data comprising:

  • (a) performing an initial slice-to-slice blurring on a volume of estimated emission source data, said volume of estimated emission source data being represented by a 3D array of voxels;

    (b) voxel-by-voxel multiplying step (a) results by a volume of attenuation coefficients to produce a volume of effective scatter source data;

    (c) voxel-by-voxel adding the volume of effective scatter source data to the volume of estimated emission source data to produce a volume of combined estimated emission and scatter source data; and

    , (d) performing a secondary slice-to-slice blurring on the volume of combined estimated emission and scatter source data.

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