Radiographic testing system with learning-based performance pred

Details Radiographic testing system with learning-based performance pred Radiographic testing system with learning-based performance pred

1998-12-30

2000-11-21

Porta, David P.

X-ray or gamma ray systems or devices

Electronic circuit

X-ray source power supply

378 97, H05G 144

Patent

active

061513830

ABSTRACT:
Disclosed herein is a radiographic imaging system which performs system performance monitoring by (1) using automatic exposure control (AEC) components to predict the average image gray level; (2) obtaining measured average image gray levels from the portions of the X-ray detector situated in the X-ray shadow of the AEC components; and then (3) comparing the predicted and measured values. The predicted values are determined by use of a prediction model which is modified by a learning system over successive exposures to provide more accurate predictions. After the learning system has sufficiently developed the prediction model, the error between the predicted and measured gray level values may be monitored in later exposures and an error routine can be activated if the error exceeds a predetermined threshold. In this case, the error may indicate that system components in the imaging chain (e.g., the detector or AEC components) require maintenance.

REFERENCES:
patent: 5751783 (1998-05-01), Granfors et al.
patent: 5949848 (1999-09-01), Gilblom

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