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US 4,804,847 AGranted
Radiation detector with an ionizable gas atop an integrated circuit
AssigneeMedrad, Inc.
InventorArthur E. Uber, III
Life of this patent
Estimating the term…
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AssigneeMedrad, Inc.
InventorArthur E. Uber, III
Estimating the term…
The radiation detector includes tissue equivalent bubbles of plastic defining volumes of gas to be ionized by radiation. One or more integrated circuits (ICs) are disposed below the volumes of gas and a collecting electrode on the IC is in direct contact with the gas. Circuitry for generating an electric field within the volume of gas moves the ions therein to the collecting electrode. The collecting electrode is part of an amplifying circuit disposed within the IC. The output from the amplifier is representative of the collected ions and therefore representative of the radiation. The signal from the amplifier is send to an interface which conditions, buffers and stores the signal. The radiation dose and dose rate are computed in the interface. A communications section transfers that data from the radiation detector. A separate calibration and display unit calibrates the interface by controlling The conditioning of the signal. An area monitor and air monitor are further enhancements of the radiation detector.
A radiation detector for measuring radiation including:
A radiation detector for measuring radiation comprising:
The combination with a radiation detector including a gas confining chamber having an electrode therein exposed to radiation ionized gas, means generating an electric field within the chamber for collecting ions of said gas on the electrode, amplifying means connected to the electrode for producing an output in response to accumulated charges produced by said collection of ions thereon, means connected to the amplifying means for registration of the output, power supply means connected to the field generating means for applying a predetermined bias voltage to the electrode while producing said output and voltage control means connected to the power supply means for polarity reversal of said bias voltage to discharge the electrode.
In combination with a radiation detector having a gas confining chamber, an electrode exposed to radiation ionized gas within the chamber, means generating and electric field within the chamber for collecting ions of said gas on the electrode, amplifying means connected to the electrode for producing an output in response to charges accumulated by said collection of ions, means for registration of the output, means for detecting leakage current for the electrode and leakage compensating means operatively connecting the amplifying means to the registration means for removal of error in the registered output resulting from said current leakage.
Dependencies are inferred from the claim text.