Position sensitive gamma detector

The invention concerns a detector for measuring the spatial gamma radiation intensity distribution. It can be used in nuclear medicine for measuring the intensity distribution of 511 keV gamma quanta resulting from positron annihilation in oganic tissue, if positron active diagnostic radiopharmaceuticals are applied, as well as in gamma cameras for the registration of low energy gamma radiation with energies above 100 keV. The detector is characterized by high counting rate, good spatial resolution, low production cost (like positron sensitive gas-filled radiation detectors) and high gamma efficiency and good time resolution (like scintillation detectors). It was found that it is possible to construct large-area position sensitive gamma detectors on the basis of the principle of a parallel-plate avalanche counter