X-ray or gamma ray systems or devices – Specific application – Computerized tomography
Patent
1998-04-28
1999-12-14
Bruce, David Vernon
X-ray or gamma ray systems or devices
Specific application
Computerized tomography
378 21, 378901, G01N 2304
Patent
active
060027398
ABSTRACT:
A cone-beam tomographic system in which computation speed is improved by reducing the reconstructed images to thin planes. Reducing the images to thin planes reduces the number of picture elements to be computed, and reduces basis functions to a simple function of the angle of a ray relative to a plane. In a variation, computation speed is further improved by making pixel size inversely proportional to the distance of a plane from an emissions source. As a result of the variable pixel size, for each projection, a ray intersecting the center of a sensor element intersects the center of exactly one pixel in each object plane.
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Bruce David Vernon
Hewlett -Packard Company
Winfield Augustus W.
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