X-ray or gamma ray systems or devices – Specific application – Computerized tomography
Patent
1990-11-19
1992-02-18
Howell, Janice A.
X-ray or gamma ray systems or devices
Specific application
Computerized tomography
378146, 378145, 378 14, G21K 104
Patent
active
050900374
ABSTRACT:
A CT apparatus reduces errors in projection data acquired in helical scanning. The imaged object moves concurrently along a translation axis and the x-ray beam is periodically translated with the imaged object so as to subtend a single predetermined volume element during the acquisition of one projection set of data for a first slice. The x-ray beam then returns to its starting position and tracks a second predetermined volume element within a next slice. The x-ray beam may be translated by moving the focal point or a collimator or a combination of both.
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patent: 4426715 (1984-01-01), Baer et al.
patent: 4630202 (1986-12-01), Mori
patent: 4789929 (1988-12-01), Nishimura et al.
patent: 4972458 (1990-11-01), Plewes
patent: 4991189 (1991-02-01), Boomgaarden et al.
Crawford Carl R.
King Kevin F.
Toth Thomas L.
General Electric Company
Howell Janice A.
Wong Don
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