Methods and apparatus for detecting beam motion in computed tomo

Details Methods and apparatus for detecting beam motion in computed tomo Methods and apparatus for detecting beam motion in computed tomo

1995-12-14

1997-08-12

Wong, Don

X-ray or gamma ray systems or devices

Source

Electron tube

378145, 378 4, H01J 3530

Patent

active

056573642

ABSTRACT:
An attenuator and detector cell arrangement for generating a signal ratio representative of focal spot position is described. The ratio is highly sensitive to focal spot position and facilitates generating, or reconstructing, a high quality image from the projection data. Further, and importantly, even if one detector cell is fully flooded, the signal intensity from such cell will vary depending upon the alignment between the focal spot and attenuator slot. Therefore, the focal spot movement detector is effective for detecting fan beam movement even if the detector cell is fully flooded. In one embodiment, the x-ray beam attenuator is configured to be positioned over the detecting surface of z-position detection cells. Slots or openings extend through the attenuator so that at least a portion of each detector cell is in free communication with an x-ray beam from the x-ray source. The slots are positioned and oriented so that one detector cell signal has its highest x-ray response at one extreme position along the focal spot trajectory and the other detector cell has its highest x-ray response at the other extreme position along the focal spot trajectory.

REFERENCES:
patent: 4675892 (1987-06-01), Plessis et al.
patent: 4812983 (1989-03-01), Gullberg et al.
patent: 4991189 (1991-02-01), Boomgaarden et al.
patent: 5131021 (1992-07-01), Gard et al.

Affiliated with

Also associated with

Rating

Methods and apparatus for detecting beam motion in computed tomo does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Methods and apparatus for detecting beam motion in computed tomo, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Methods and apparatus for detecting beam motion in computed tomo will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-166737