Three-dimensional reprojection and backprojection methods...

Details Three-dimensional reprojection and backprojection methods... Three-dimensional reprojection and backprojection methods...

2007-06-05

2007-06-05

Ahmed, Samir (Department: 2624)

Image analysis

Applications

Biomedical applications

C382S131000, C378S062000, C378S098000

Reexamination Certificate

active

10356161

ABSTRACT:
Methods for three-dimensional projecting and backprojecting rays with respect to voxels/detector bins to attenuate/eliminate high-frequency artifacts, are disclosed. A distance-driven technique wherein the transitions of the voxels and the detector bins are respectively projected onto a predetermined plane. This projection allows a determination of the contribution of each of the voxels/bins for each of the bins/voxels with lower computation time and improved artifact free images.

REFERENCES:
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patent: 5416815 (1995-05-01), Hsieh
patent: 6137856 (2000-10-01), Lin
patent: 6339632 (2002-01-01), Besson
patent: 6438195 (2002-08-01), Hsieh
patent: 2003/0208117 (2003-11-01), Shwartz et al.
Schwinger, R.B. et al., “Area Weighted Convolutional Interpolation For Data Reprojection In Single Photon Emission Computed Tomography”,Journal of Numerical Control, Concord, NH, US, vol. 13, No. 3, May 1, 1986, pp. 350-353.
International Search Report for RD-123956.

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