Generic architectures for backprojection algorithm

Details Generic architectures for backprojection algorithm Generic architectures for backprojection algorithm

1998-12-14

2000-10-24

Bruce, David V.

X-ray or gamma ray systems or devices

Specific application

Computerized tomography

378901, A61B 603

Patent

active

061378569

ABSTRACT:
A method and apparatus are provided for updating an image pixel in both ray-driven and pixel-driven tomographic systems. The method includes the steps of determining (300) a distance and a ray angle of the pixel from an X-ray source of the ray-driven tomographic system and retrieving (302) a plurality of projection data elements based upon the ray angle. The method further includes the steps of retrieving (304) a corresponding set of interpolation values from a lookup table based upon the determined distance and ray angle and multiplying (306) the interpolation value by a respective projection data element. The method also includes the step of summing (308) the multiplied projection data elements and interpolation values.

REFERENCES:
patent: 5047931 (1991-09-01), Lin
patent: 5473654 (1995-12-01), Kotian et al.

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