X-ray computed tomography device and method

Details X-ray computed tomography device and method X-ray computed tomography device and method

1997-04-03

1999-01-26

Porta, David P.

X-ray or gamma ray systems or devices

Specific application

Computerized tomography

378 15, A61B 603

Patent

active

058645977

ABSTRACT:
An x-ray computed tomography device and method for automatically setting scan conditions in order to substantially equalize a designated slice thickness with an effective slice thickness. The device according to the present invention preferably employs a helical scan method. While a rotatable frame portion is continuously rotated in a scanning operation, a detected object can be moved in a body longitudinal direction. A slice thickness designated by an x-ray optical mechanism including a slit and a beam trimming machine and a scan pitch of the helical scan are controlled so that the designated and effective slice thicknesses are substantially equal.

REFERENCES:
patent: 4789929 (1988-12-01), Nishimura et al.
patent: 5270923 (1993-12-01), King et al.
patent: 5485493 (1996-01-01), Heusher et al.
patent: 5544212 (1996-08-01), Heuscher
Basic Principles and Clinical Applications of Helical Scan, pp. 121-130, T. Katakura, et al., "Performance Evaluation of the Helical Scan Method" no date.

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