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

1992-09-16

1994-12-27

Dzierzynski, Paul M.

X-ray or gamma ray systems or devices

Specific application

Computerized tomography

378 14, 378901, 36441315, G01N 2304, G01N 23083

Patent

active

053772504

ABSTRACT:
An x-ray computed tomography system for helically scanning a patient, by translating the patient as projections of the patient at various beam angles are obtained, employs a detector array having multiple rows displaced in along the direction of translation. The voxel attenuation values reconstructed from the multiple rows are combined to produce an image having an improved beam profile in along the translation direction. A cone beam reconstruction method, which accounts for the divergence of the rays of a fan beam of x-rays, and helical scanning is used to further improve the slice profile. The voxels may be selected so that they cluster closely about the position of the desired slice plane.

REFERENCES:
patent: 5170439 (1992-12-01), Zeng et al.
patent: 5270926 (1993-12-01), Tam
patent: 5291402 (1994-03-01), Pfoh
Practical Cone-Beam Algorithm, Feldkamp et al., J. Opt. Soc. Am. A/vol. 1, No. 6/Jun. 1984.

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