US 4,893,015 A · Dual mode radiographic measurement method and device

Abstract

A method and apparatus for detecting and measuring radiation is disclosed. The apparatus includes a scintillator crystal and a photodetector optically coupled to the scintillator crystal as well as first and second analyzing means. The first analyzing means is coupled to an output of the photodetector for counting discrete electronic pulses generated by the photodetector. The second analyzing means operates simultaneous with the first analyzing means and is coupled to another output of the photodetector for integrating current generated by the photodetector. The method includes the steps of irradiating a scintillator with x-ray energy, detecting light emitted from the scintillator and converting the light into a flow of electrons, detecting and counting discrete pulses of the flow of electronics and simultaneously integrating electronic current corresponding to the flow of electrons.

Claims14

Dependent claims

A radiation measuring device for measuring a wide range of X-ray intensities comprising:

a scintillator crystal for emitting light in response to irradiation by X-rays;
photodetector means optically coupled to said scintillator crystal for receiving the emitted light and converting said emitted light into electrical current, said photodetector means comprising first and second outputs;
first and second analyzing means respectively responsive simultaneously to said first and second outputs;
said first analyzing means coupled to said first output of said photodetector means for counting discrete electronic pulses generated by said photodetector means, said first analyzing means producing a first output signal;
said second analyzing means operated simultaneously with said first analyzing means coupled to said second output of said photodetector means, said second analyzing means including integrating means for integrating current generated by said photodetector means, said second analyzing means producing a second output signal;
receiving means responsive to said first and second output signals for measuring detected radiation.

3 more elements

Dependencies are inferred from the claim text.

Dual mode radiographic measurement method and device

Life of this patent

Dual mode radiographic measurement method and device

Life of this patent

Abstract

Claims14