Abstract: A scintillation camera, comprises the structure of a scintillation crystal (10), a collimator (20), a light guide (30), an array (50) of p photodetectors, p acquisition channels (60), and a processor (100) for supplying the coordinates x.sub.j and y.sub.j of a scintillation j and its associated energy E.sub.j, and further comprises structure characterized in that:(A) the p acquisition channels apply p digital signals to the input of the processor;(B) the processor (100) itself comprises:(a) a bus for transferring the p digital signals;(b) a digital summing stage (200);(c) a scintillation processing stage; and(C) a detection, sequencing and storage stage (400) which receives a signal which corresponds to the sum of the p output signals of the photodetectors, is provided in order to supply the various clock signals and the correction coefficients for the scintillation processing stage.

Abstract: A device for measuring nuclear radiation which comprises a scintillator (10) for the detection of the radiation quanta which is optically coupled to an entrance window of a photodetector (20) for converting the scintillations produced by the radiation into current pulses. The device comprises a digital circuit which is connected to a sampling and analog-to-digital conversion circuit (40) and which is used to determine the energy of each nonsuperposed radiation quantum; when the radiation quanta produce partly superposed current pulses, this circuit determines the energy content of the individual radiation quanta by extrapolations and corrections, notably by means of a memory (170 and/or 180) in which the correction coefficients are stored for performing extrapolations and corrections under the control of a sequencer (200) as initiated by a pulse edge detector (80) which detects the incidence of a radiation quantum.

Abstract: A radiation measuring device comprises a scintillator for detection of radiation, a photomultiplier tube and an amplifier circuit for supplying signals having amplitudes dependent on the output current of the photodetector. A first series circuit of a sampling and digital-to-analog converter circuit and an adder is provided with a first storage register connected to the adder. A second storage register is connected to the output of the adder, and the output of the second storage register provides the output of the measuring device. A second series circuit is connected to the output of the photodetector or the amplifier circuit, and includes a pulse start detector, a clock pulse generator, a clock pulse counter, and a comparison circuit. The output of the comparison circuit is connected to the second storage register for storing a sum signal which is supplied by the adder, as well as the first storage register, in order to reset the first storage register to zero.

Abstract: The invention relates to a gamma camera comprising a scintillation crystal, a light intesifier, an optical guide for dispersing the light, and a scintillation localizer. The light intensifier comprises a mosaic of independent, juxtaposed, identical modules, each of which comprises an entrance face and an exit face. The entrance face is provided with a photocathode and is optically coupled to the exit face of the scintillation crystal. The exit face is provided with a screen and is coupled to the scintillation localizer.

Abstract: The invention relates to a gamma camera for forming the image of a radiation distribution, comprising a scintillation crystal, several photomultipliers which are arranged according to a regular array opposite a surface of the scintillation crystal, the photosensitive surface of each photomultiplier facing the scintillation crystal, each photomultiplier being connected to arithmetic circuits which calculate the coordinates of the scintillations on the basis of the signals applied thereto by the photomultipliers, the gamma camera furthermore comprising an electrical circuit for correcting the calculated coordinates, the corrections being determined by the distance between the scintillation and the center of the photomultiplier tube situated nearest to the scintillation.