X-ray or gamma ray systems or devices – Specific application – Computerized tomography
Patent
1994-09-22
1996-01-09
Porta, David P.
X-ray or gamma ray systems or devices
Specific application
Computerized tomography
378901, 25036304, 1286534, 364731, 36441316, A61B 603, G01N 23083
Patent
active
054835674
ABSTRACT:
Tomographic data acquired in a polar reference frame is rapidly converted into data arranged in a Cartesian system suitable for processing and/or display by a program that may operate efficiently on an electronic computer. The program identifies each polar voxel, defining the region of the polar data, to one or more Cartesian voxels that overlap with it. Truncation techniques developed for use with computer graphics are used to determine an area of overlap between the voxels. Areas of overlap are indexed in a conversion table which may be used for rapid conversion between data acquired under these two coordinate systems.
REFERENCES:
patent: 2436178 (1948-02-01), Rajchman
patent: 4208721 (1980-06-01), Eisenberg
patent: 5333164 (1994-07-01), Tam
Bruce David Vernon
Porta David P.
Wisconsin Alumni Research Foundation
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