Medical radiographic apparatus and method

Details Medical radiographic apparatus and method Medical radiographic apparatus and method

1979-10-12

1981-02-10

Church, Craig E.

Radiant energy

Inspection of solids or liquids by charged particles

Analyte supports

250401, 250402, G03B 4116

Patent

active

042503876

ABSTRACT:
Computerized tomographic X-ray apparatuses direct X-rays, usually in a fan-shaped distribution, through the body of a patient. In some examples the fan distribution may subtend angles of 50.degree. or more at the source. It has been found that such tubes, particularly of the rotating anode type, tend to have X-ray emission from regions surrounding the focal spot and it is not convenient to use anode shields to eliminate it. This off-focus radiation can present problems, especially when attenuators are used to equalize absorbing paths through the patient, since the off-focus radiation can sometimes be less attenuated than the main beam. It is proposed to correct the signals produced by the X-ray detectors, for off-focus radiation. A profile of off-focus or halo radiation is produced and the attenuation imposed on it is estimated. The estimates are used to suitably modify the signals produced by the X-ray detectors (or signals derived from the detector outputs) so as to correct for the presence of off-focus radiation.

REFERENCES:
patent: 3940625 (1976-02-01), Hounsfield
patent: 4132654 (1979-01-01), Braun

Affiliated with

Also associated with

Rating

Medical radiographic apparatus and method does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Medical radiographic apparatus and method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Medical radiographic apparatus and method will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1666899