Crystal array, detector, medical detection device and method of manufacturing crystal array
A crystal array, a detector, a medical detection device and a method for manufacturing a crystal array are provided. The crystal array includes a plurality of crystals arranged in an array, each of the crystals having a light incident surface, a light exit surface, and a connection surface connecting the light incident surface to the light exit surface, where the connection surface of at least one of two adjacent crystals includes a rough surface and a smooth surface connected to the rough surface, and the rough surface and the smooth surface are arranged along a length direction of the crystal.
1. A crystal array for a detector of a medical detection device, the crystal array comprising:
a plurality of crystals arranged in an array, each of the crystals having
a light incident surface,
a light exit surface, and
a connection surface connecting the light incident surface to the light exit surface,
wherein the connection surface of at least one of two adjacent ones of the crystals comprises a rough surface and a smooth surface connected to the rough surface, and the rough surface and the smooth surface are arranged along a length direction of the crystal, and wherein an area of the rough surface is determined based on a size of the crystal and an action depth.
2. The crystal array of claim 1 , wherein the two adjacent ones of the crystals are coupled with each other through air.
3. The crystal array of claim 1 , wherein the smooth surface is connected to the light incident surface, and the rough surface is connected to the light exit surface.
4. The crystal array of claim 1 , wherein the area of the rough surface is smaller than an area of the smooth surface.
5. The crystal array of claim 1 , wherein the light incident surface and the light exit surface are smooth surfaces each, and are disposed in parallel to each other along a direction perpendicular to the length direction.
6. The crystal array of claim 1 , wherein a material of the crystals is at least one of LYSO, LSO, BGO, NaI, LaBr3, GSO, LGSO or GACC.
7. The crystal array of claim 1 , further comprising a reflective film, wherein the reflective film at least partially covers a periphery of the array formed by the crystals, and a material of the reflective film is at least one of PTFE, Teflon, MgO, TiO2, BaSo4 or ESR.
8. The crystal array of claim 1 , wherein the area of the rough surface is determined based on a position of tailing in a position map of an entirely rough surface.
9. The crystal array of claim 1 , wherein a length of the crystal is inversely proportional to a blocking capability of a material of the crystal.
10. The crystal array of claim 1 , wherein light transmits differently at different action depths among different crystals of the crystal array.
11. The crystal array of claim 1 , wherein the light incident surfaces, the light exit surfaces, and the connection surfaces of the two adjacent ones of the crystals are configured, such that position points of a corresponding position map expand outwards to ensure an air gap between the two adjacent ones of the crystals and to reduce a difference in transmission of photons at different action depths.
12. A detector, comprising:
a crystal array comprising a plurality of crystals arranged in an array, each of the crystals having a light incident surface, a light exit surface, and a connection surface connecting the light incident surface to the light exit surface, wherein the connection surface of at least one of two adjacent ones of the crystals comprises a rough surface and a smooth surface connected to the rough surface, and the rough surface and the smooth surface are arranged along a length direction of the crystal, and wherein an area of the rough surface is determined based on a size of the crystal and an action depth; and
a photodetector assembly comprising photodetectors, the photodetectors being arranged in an array and facing the respective light exit surfaces of the crystals.
13. The detector of claim 12 , wherein the two adjacent ones of the crystals are coupled with each other through air.
14. The detector of claim 12 , wherein the smooth surface is connected to the light incident surface, and the rough surface is connected to the light exit surface.
15. The detector of claim 12 , wherein the area of the rough surface is smaller than the area of the smooth surface.
16. The detector of claim 12 , wherein the light incident surface and the light exit surface are smooth surfaces each, and are disposed in parallel to each other along a direction perpendicular to the length direction.
17. The detector of claim 12 , wherein a material of the crystals is at least one of LYSO, LSO, BGO, NaI, LaBr3, GSO, LGSO or GACC.
18. The detector of claim 12 , wherein the crystal array further comprises a reflective film, wherein the reflective film at least partially covers a periphery of the array formed by the crystals, and a material of the reflective film is at least one of PTFE, Teflon, MgO, TiO2, BaSo4 or ESR.
19. The detector of claim 12 , wherein the photodetector comprises at least one of a silicon photomultiplier or a photomultiplier tube.
20. A method of manufacturing a crystal array comprising a plurality of crystals, the method comprising:
processing outer surfaces of each of the plurality of crystals to form a light incident surface, a light exit surface, and a connection surface connecting the light incident surface to the light exit surface;
arranging the crystals in an array; and
disposing a reflective film on a periphery of the array and the light incident surfaces to form the crystal array,
wherein the connection surface of at least one of two adjacent ones of the crystals comprises a rough surface and a smooth surface connected to the rough surface, and the rough surface and the smooth surface are arranged along a length direction of the crystal, and wherein an area of the rough surface is determined based on a size of the crystal and an action depth.