System and method of performing tomographic reconstruction and volume rendering using texture mapping
First Claim
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1. A method, for use in a computer system, for back projecting and volume rendering of projection data and volume data respectively, comprising the steps of:
- (1) texture mapping at least one of the projection data and volume onto a polygon;
(2) rendering the polygon to generate an intermediate result; and
(3) accumulating the intermediate result with prior intermediate results to thereby generate a final reconstruction.
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Abstract
Volume rendering and tomographic reconstruction center around solving two related integral equations: a volume rendering integral (a generalized Radon transform) and a filtered backprojection integral (the inverse Radon transform). Both of these equations are of the same mathematical form and can be dimensionally decomposed and approximated using Riemann sums over a series of resampled images. When viewed as a form of texture mapping and frame buffer accumulation, enormous hardware enabled performance acceleration is possible.
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24 Claims
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1. A method, for use in a computer system, for back projecting and volume rendering of projection data and volume data respectively, comprising the steps of:
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(1) texture mapping at least one of the projection data and volume onto a polygon; (2) rendering the polygon to generate an intermediate result; and (3) accumulating the intermediate result with prior intermediate results to thereby generate a final reconstruction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A system for backprojecting and volume rendering of projection data and volume data respectively, comprising:
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texture mapping means for texture mapping at least one of the projection data and volume data onto a polygon; rendering means for rendering the polygon to generate an intermediate result; and accumulating means for accumulating the intermediate result with prior intermediate results to thereby generate a final reconstruction. - View Dependent Claims (22, 23, 24)
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Specification