X-ray data acquisition system and method for calibration

US4068306A · kind A · utility

Assignee

• General Electric Company · US

Inventors

• Arthur Chen · Taipei, TW
• William D. Barber · Ballston Lake, US
• Walter H. Berninger · Schenectady, US
• Gerald J. Carlson · West Allis, US
• Norman C. Gittinger · Schenectady, US
• James R. Whitten · Scotia, US

Key dates

• Filing date: Jul 12, 1976
• Grant date: Jan 10, 1978
• Expiry date: Jul 12, 1996

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S378/901
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A tomographic x-ray imaging system comprises a large plurality of parallel data acquisition channels which integrate and digitize signals from an array of x-ray detectors. Calibration pulses are injected into each data acquisition channel to permit measurement of drift in electronic gain and dc offset parameters. Separate x-ray detectors continuously monitor the intensity of the x-ray source. The measured values for channel gains, dc offsets, and source intensity are fed to a digital computer where they are automatically combined with x-ray transmission data to compensate for system drift and extend the period between calibration measurements.