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Ceramic phosphor laminated body with fused optical elements, method of manufacturing thereof and article comprising the same

An optical interface and scintillator technology, applied in optical components, chemical instruments and methods, optics, etc., can solve the problems of detector energy and time resolution reduction

Active Publication Date: 2017-07-14
SIEMENS MEDICAL SOLUTIONS USA INC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This causes a significant reduction in detector energy and temporal resolution

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  • Ceramic phosphor laminated body with fused optical elements, method of manufacturing thereof and article comprising the same
  • Ceramic phosphor laminated body with fused optical elements, method of manufacturing thereof and article comprising the same
  • Ceramic phosphor laminated body with fused optical elements, method of manufacturing thereof and article comprising the same

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[0013] Disclosed herein are scintillator phosphor stacks having two or more garnet compositions different from each other. The garnet composition has a graded composition (e.g., a gradient) at the interface between the two or more garnet compositions, and the graded composition hinders the optical interface between the two or more compositions exist. As a result of having a graded composition rather than a sharp interface between two or more different compositions, there are no losses due to reflections at the interface boundaries. In one embodiment, the refractive index value at the boundary between different garnet compositions changes gradually from one garnet composition to another. An optical interface is one in which there is an abrupt break in the refractive index due to the use of an optical coupling medium.

[0014] Also disclosed herein are new methods of making scintillator-phosphor stacks that are free of interfacial boundaries between two different compositions ...

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Abstract

The invention discloses a ceramic phosphor laminated body with fused optical elements, a method of manufacturing thereof and articles comprising the same. Disclosed herein is a scintillator comprising a plurality of garnet compositions in a single block having the structural formula (1): M 1 aM 2 bM 3 cM 4 dO 12 (1) where O represents oxygen, M 1 , M 2 , M 3 , and M 4 represents a first, second, third and fourth metal that are different from each other, where the sum of a + b + c+ d is about 8, where "a" has a value of 2 to 3.5, "b" has a value of 0 to 5, "c" has a value of 0 to 5 "d" has a value of 0 to 1, where "b" and "c", "b" and "d" or "c" and "d" cannot both be equal to zero simultaneously, , where M 1 is rare earth element including gadolinium, yttrium, lutetium, or a combination thereof, M 2 is aluminum or boron, M 3 is gallium and M 4 is a codopant; wherein two compositions having identical structural formulas are not adjacent to each other and wherein the single block is devoid of optical interfaces between different compositions.

Description

technical field [0001] Disclosed herein are ceramic phosphor stacks (phoswich) with fused optical elements, methods of making the same, and articles incorporating the same. Background technique [0002] In radiological detection applications, it is often desirable to extract information on the depth of interaction from the detection medium. This improves the localization of interacting gamma particles within the solid. A common method that allows extraction of this information is through the use of phosphor stack structures, where two or more scintillators are combined together into a single functional unit. The scintillation materials used to construct the phosphor stack have unique scintillation properties (eg, different scintillation decay times, or different wavelengths) that can be used to determine which parts of the phosphor stack interact with the gamma particles. Since the scintillators used in the phosphor stack structure are optically coupled to each other by us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/80
CPCC09K11/7701C09K11/7769C09K11/7774C09K11/7706A61B6/037G21K4/00A61B6/032G01T1/2008G02B6/29332G02B6/4298G01T1/2002G21K2004/02G21K2004/06C09K11/77
Inventor M.S.安德烈科P.C.科亨R.A.明策尔M.J.施曼德
Owner SIEMENS MEDICAL SOLUTIONS USA INC