Data acquisition circuitry for use in computerized tomography sy

Details Data acquisition circuitry for use in computerized tomography sy Data acquisition circuitry for use in computerized tomography sy

1983-08-15

1986-04-15

Smith, Alfred E.

X-ray or gamma ray systems or devices

Specific application

Computerized tomography

378 98, A61B 600, H01J 4014

Patent

active

045832404

ABSTRACT:
A digital acquisition system for use in a computerized radiation tomography system employs track and hold means associated with each channel of the radiation detector in the tomography system. Each channel of the radiation detector is connected to a voltage follower transistor and resistor. A signal from the voltage follower transistor and resistor is applied through a Butterworth filter and amplifier to a transconductance amplifier which provides a signal for application to a charge storage capacitor. The capacitor is connected to the detector channel except during each limited period of time when the charge is held for measurement and conversion to a digital form. The data acquisition system has fewer components, and the simplicity of the circuitry increases the circuit reliability.

REFERENCES:
patent: 4134018 (1979-01-01), Weinkauf et al.
patent: 4334154 (1982-06-01), Sandland
patent: 4484340 (1984-11-01), Yamaguchi et al.

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