SCINTILLATOR MATERIAL Russian patent published in 2018 - IPC C09K11/80 C09K11/78 G01T1/202 A61B6/03 

FIELD: chemistry.

SUBSTANCE: invention can be used in order to detect gamma photons, as well as in the medical devices, which contains the gamma-photon detectors, for example in the positron emission tomography (PET) imaging systems. Scintillator material is a ceramic or polycrystalline garnet with the formula, (Gd_3-x-yLu_xCe_y)(Al_5-zGa_z-aLu_a)O₁₂, where x is from 0.3 up to 0.6; y is from 0.003 up to 0.03 and corresponds to the amount of cerium from 0.1 up to 1.0 wt%; z from 1.5 up to 3.5; a from 0 up to 0.3; has the attenuation time of less than 300 ns and the density of 5-8 g/cm³. Gamma-photon detector comprises the mentioned scintillator material in optical communication with the optical detector and has the active area of less than 5 cm². PET imaging system includes the scanning field and at least two gamma-photon detectors, which contain the mentioned scintillator material and which are arranged radially around the scanning field. In order to create the PET image with the mentioned imaging system, the radioactive label is first introduced to the subject, then the persons are waiting for the predetermined absorption period, and carry out imaging at least the part of the subject body.

EFFECT: technical result: improved sensitivity to gamma photons.

17 cl, 7 dwg