Reconstruction method for helical scanning computed tomography a

Details Reconstruction method for helical scanning computed tomography a Reconstruction method for helical scanning computed tomography a

1993-01-26

1995-07-04

Dzierzynski, Paul M.

X-ray or gamma ray systems or devices

Specific application

Computerized tomography

378 4, 378901, 36441316, 36441317, A61B 603, G01N 23083

Patent

active

054307830

ABSTRACT:
An x-ray computed tomography system for helically scanning a patient translates the patient as projections of the patient at various beam angles are obtained. A cone beam reconstruction method, which accounts for the divergence of the rays of a fan beam of x-rays, is used to reconstruct multiple narrow slices which are combined to provide a larger slice with an improved slice profile. The conical shape of the fan beam causes some voxels to be scanned more than once for a given beam angle and this extra data is weighted and combined with its counterpart data to improve the quality of the image.

REFERENCES:
patent: 5241576 (1993-08-01), Lonn
patent: 5262946 (1993-11-01), Heuscher
patent: 5291402 (1994-03-01), Pfoh
patent: 5377250 (1994-12-01), Hu
Practical Cone-Beam Algorithm, Feldkamp et al., J. Opt. Soc. Am. A/vol. 1, No. 6/Jun. 1984.

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