X-ray or gamma ray systems or devices – Specific application – Computerized tomography
Patent
1989-10-17
1991-06-25
Westin, Edward P.
X-ray or gamma ray systems or devices
Specific application
Computerized tomography
378 99, 378 98, 378 62, 358111, H05G 164, A61B 100, H04N 532
Patent
active
050273809
ABSTRACT:
In an X-ray fluoroscopic apparatus, a diaphragm is inserted in an X-ray emitted from an X-ray tube onto an object to be examined, and only a desired slice of the object is exposed with X-rays emitted from a large number of directions. The X-ray transmitted through the object is caused to be incident on an image intensifier, and an optical image therefrom is incident on a TV camera formed of a solid-state image pickup device, such as a CCD, through an optical system. An output from the TV camera is supplied to a memory, X-ray projection data from a large number of directions are stored in the memory, and an output from the memory is supplied to an image reconstruction processor, thus reconstructing a tomogram. The optical image from the image intensifier is incident on only one or a plurality of horizontal scanning lines corresponding to the slice in an imaging area of the TV camera. Therefore, pixel data in a region except for the region corresponding to the slice are vertically transferred at high speed, are accumulated in a horizontal transfer CCD, are output from the horizontal transfer CCD, and are discharged without being written in the memory. The pixel data of the slice are vertically transferred at normal speed, are output from the horizontal transfer CCD line by line, and are written in the memory.
REFERENCES:
patent: 4433429 (1984-02-01), Finkenzeller et al.
patent: 4733313 (1988-03-01), Izumita et al.
patent: 4884291 (1989-11-01), Nicolay
Gruner; "CCD and Vidicon . . . Practice (invited)"; 1989; pp. 1545-1551.
Kabushiki Kaisha Toshiba
Westin Edward P.
Wong Don
LandOfFree
Diagnostic X-ray apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Diagnostic X-ray apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Diagnostic X-ray apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1046428