SCINTILLATION RADIATION MEASURING DEVICE COMPRISING A PHOTOMULTIPLIER TUBE, AND SCINTILLATION CAMERA COMPRISING SUCH A DEVICE

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.