Self-calibrating computed tomography imaging system

Details Self-calibrating computed tomography imaging system Self-calibrating computed tomography imaging system

1993-12-30

1995-09-12

Dzierzynski, Paul M.

X-ray or gamma ray systems or devices

Specific application

Computerized tomography

378901, 36441316, A61B 603, G01N 23083

Patent

active

054504619

ABSTRACT:
During acquisition of X-ray attenuation measurements of a patient being imaged, the measurements are processed to determine error factors for each detector in the system. In doing so, an average value is calculated for each detector from the X-ray attenuation measurements acquired during a scan of the patient. The set of average values should increase and decrease monotonically going toward and away from the value in the set for center detector. Deviation from such monotonic variation indicates a calibration error and is used to change a calibration factor in the signal processing circuit for the corresponding detector.

REFERENCES:
patent: 4035651 (1977-07-01), LeMay
patent: 4472823 (1984-09-01), Waltham
patent: 4654796 (1987-03-01), Takagi et al.
patent: 5301108 (1994-04-01), Hsieh

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