RADIATION DETECTOR AND RADIATION DETECTOR MANUFACTURING METHOD

摘要

In a radiation detector, gap portions and opening portions are filled with a high-viscosity adhesive agent to prevent inclusion of air bubbles in a first adhesive layer and a second adhesive layer. The result is that scintillator light is not scattered by air bubbles, making it possible to obtain more accurate imaging information. Moreover, since the inclusion of air bubbles is prevented, it is possible to avoid weakening of the optical couplings in the radiation detector. Consequently, the optical couplings do not become weakened in the radiation detector that includes an SiPM element that is provided with gap portions. Because the SiPM element is not affected by the strong magnetic fields that are produced by the MR device, the radiation detector can be used in a PET-MR. This enables the achievement of a PET-MR having a radiation detector wherein the optical coupling is more secure.

主权项

1. A radiation detector comprising:
a scintillator block for detecting incident radiation and emitting light; a light guide, optically coupled to the scintillator block, for transmitting light emitted from the scintillator block; a solid-state photodetector, wherein a plurality of photodetecting elements for converting, into electric signals, light that is transmitted from the light guide, is arrayed in a two-dimensional matrix, and is optically coupled to the light guide; a reflector for reflecting light, disposed between the light guide and the solid-state photodetector, and having opening portions in positions facing the photodetecting portions of the photodetecting elements; a first adhesive layer for bonding the reflector and the solid-state photodetector; a first filling layer for filling a gap portion between the photodetecting elements; a second adhesive layer for bonding the light guide and the reflector; and a second filling layer for filling an opening portion that is provided in the reflector.