Methods and apparatus for helical image reconstruction in a comp

Details Methods and apparatus for helical image reconstruction in a comp Methods and apparatus for helical image reconstruction in a comp

1996-10-11

1998-01-13

Porta, David P.

X-ray or gamma ray systems or devices

Specific application

Computerized tomography

378 15, 378901, A61B 603

Patent

active

057086907

ABSTRACT:
The present invention, in one form, is a system for performing image reconstruction from projection data acquired in a helical scan. More specifically, the system implements an incremental reconstruction algorithm for helical scan projection data which does not require filtering, weighting and backprojecting such projection data for generating each image. Particularly, an overscan weighting algorithm generates weighting factors to be applied to projection data to generate base image projection data. An update weighting algorithm generates update weighting factors to be applied to the base image projection data to generate subsequent image projection data.

REFERENCES:
patent: 4275444 (1981-06-01), Ryan
patent: 4590582 (1986-05-01), Umemura

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