Method and apparatus for reconstruction of 3D image volumes...

Details Method and apparatus for reconstruction of 3D image volumes... Method and apparatus for reconstruction of 3D image volumes...

2011-01-25

2011-01-25

Seth, Manav (Department: 2624)

Image analysis

Applications

Biomedical applications

C382S285000, C378S004000, C378S021000, C128S922000

Reexamination Certificate

active

07876944

ABSTRACT:
The invention provides improvements in reconstructive imaging of the type in which a volume is reconstructed from a series of measured projection images (or other two-dimensional representations) by utilizing the capabilities of graphics processing units (GPUs). In one aspect, the invention configures a GPU to reconstruct a volume by initializing an estimated density distribution of that volume to arbitrary values in a three-dimensional voxel-based matrix and, then, determining the actual density distribution iteratively by, for each of the measured projections, (a) forward-projecting the estimated volume computationally and comparing the forward-projection with the measured projection, (b) generating a correction term for each pixel in the forward-projection based on that comparison, and (c) back-projecting the correction term for each pixel in the forward-projection onto all voxels of the volume that were mapped into that pixel in the forward-projection.

REFERENCES:
patent: 5744802 (1998-04-01), Muehllehner et al.
patent: 6470070 (2002-10-01), Menhardt
Mueller et al., IEEE Publication, 2000, “Rapid 3-D cone beam reconstruction with the simultaneous algebraic reconstruction technique (SART) using 2-D texture mapping hardware” (pp. 1227-1237).

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