FIELD: medicine.SUBSTANCE: group of inventions refers to medical equipment, namely to systems and methods for nuclear medical visualisation. A system for nuclear medical visualisation, which uses radiation detector units with pixel scintillation crystals, comprises a dissipation detector configured to detect and mark the detected dissipated and non-dissipated radiation events stored in the list mode. Coincident pairs of both dissipated and non-dissipated radiation events are detected and respective lines of response (LOR) are determined. Using the lines of response (LOR) corresponding to both dissipated, and detected non-dissipated radiation events can recover the first presentation of the image of the analysed region to form the low-definition image possessing the good statistic characteristics in relation to noise. A second high-definition image of the whole examination region or its partial volume can be reproduced with the use of the lines of response respective to the detected non-dissipated radiation events. An assessment processor is configured to recover at least one value, e.g. volume, count rate, standardised uptake value (SUV), etc. from at least the low-definition image, the high-definition image or the combined image.EFFECT: suing the invention enables increasing the image definition, reducing the superposition effect and increasing the signal/noise relation.22 cl, 3 dwg
PET-DETECTOR ASSEMBLY WITH IMPROVED ASSESSMENT CHARACTERISTICS