Method and apparatus for helical computed tomography scanning wi

Details Method and apparatus for helical computed tomography scanning wi Method and apparatus for helical computed tomography scanning wi

1997-03-31

1998-10-27

Porta, David P.

X-ray or gamma ray systems or devices

Specific application

Computerized tomography

378901, A61B 603

Patent

active

058287183

ABSTRACT:
A system for and method of generating a reconstructed tomographic image is described using an asymmetric detector array during a helical scan. An improved helical weighting system applies a helical halfscan technique to data collected by a symmetric portion of an asymmetric detector system and applies a helical fullscan technique to data collected by an asymmetric portion of the asymmetric detector system. The preferred system comprises an equi-angle interpolator, a streak artifact suppression filter, and an isocenter interpolator that preserve the distinction between even and odd data points in parallel beam projection data.

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Hsieh, J., A General Approach To The Reconstruction of X-ray Helical Computed Tomography, Med. Phys. 23 (2), Feb. 1996, pp. 221-229.
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Abramowitz, M. et al., Handbook of Mathematical Functions, May 1968.

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