Method and apparatus for pre-processing cone beam projection dat

Details Method and apparatus for pre-processing cone beam projection dat Method and apparatus for pre-processing cone beam projection dat

1992-07-02

1995-02-14

Dzierzynski, Paul M.

X-ray or gamma ray systems or devices

Specific application

Computerized tomography

378 8, 378901, 36441315, 36441316, G01N 23083

Patent

active

053902262

ABSTRACT:
An improved method and apparatus for preprocessing cone beam attenuation data to reconstruct a three dimensional image of a particular region of interest of an object by a process of inverse Radon transformation is described. The number of required operations is substantially reduced by selectively retaining for further processing only that cone beam attenuation data acquired within a select closed region of the surface of the array detector wherein this region provides data corresponding to beams actually attenuated in passing through the region of interest of the object. In this manner, unnecessary beam attenuation data is discarded at the earliest possible opportunity to expedite image processing.

REFERENCES:
patent: 4709333 (1987-11-01), Crawford
patent: 5073910 (1991-12-01), Eberhard et al.
patent: 5187659 (1993-02-01), Eberhard et al.
patent: 5257183 (1993-10-01), Tam
patent: 5333164 (1994-07-01), Tam
U.S. Patent Application Serial No. 07/725,142, filed Jul. 3, 1991, Kwok C. Tam, "Method and Apparatus for Acquiring Complete Radon Data for Exactly Reconstructing a Three Dimensional Computerized Tomography Image of a Portion of an Object Irradiated by a Cone Beam Source".

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