X-ray or gamma ray systems or devices – Specific application – Computerized tomography
Patent
1993-11-17
1995-10-24
Porta, David P.
X-ray or gamma ray systems or devices
Specific application
Computerized tomography
378 19, 378901, 36441213, 36441319, A61B 603, G01N 2308
Patent
active
054616514
ABSTRACT:
Computerized tomography (CT) reconstruction of images is accomplished for asymmetric grids. After initial data acquisition and normalization, the asymmetric projection data is distorted by a compression process which effectively converts the data into symmetric data. The data may then be processed using Radon reconstruction procedures which convert projection data into object density functions. The object density functions or data which are provided are then subject to a stretching or extension procedure which compensates or reverses the initial distortion or compression. Cone beam imaging with asymmetric grids may be two-dimensional or three dimensional when utilizing the technique.
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Bruce David Vernon
General Electric Company
Porta David P.
Webb II Paul R.
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