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High energy resolution scintillators having high light output

a scintillator and high light output technology, applied in the field of high-energy radiation detector compositions of scintillators, can solve the problem of high limit of time difference measuremen

Inactive Publication Date: 2008-12-04
GENERAL ELECTRIC CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

"The present invention provides a scintillator composition that includes a matrix material made of an alkaline earth metal and a lanthanide halide, along with an activator ion of cerium, bismuth, praseodymium, or combinations thereof. The scintillator composition has improved performance and can detect radiation with high accuracy. The detector element of the imaging system has a photon detector optically coupled to the scintillator composition and can produce electrical signals upon detecting the photons generated by the radiation. The method of operation involves transmitting radiation through an object and receiving it by the scintillator material to produce photons that are then detected by the photon detector."

Problems solved by technology

The limitations of this time difference measurement are highly dependent on the stopping power, light output, and decay time of the scintillator material.

Method used

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  • High energy resolution scintillators having high light output

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Embodiment Construction

[0019]FIG. 1 illustrates an exemplary radiation-based imaging system, such as a nuclear imaging detector employed in a positron emission tomography, in accordance with certain embodiments of the present technique. In the illustrated embodiment, the imaging system 10 includes a radiation source 12 positioned such that a major portion of the radiation 14 emitted from the radiation source 12 passes through the target 16, such as an animal, or a human, or a baggage item, or any target having internal features or contents. In certain embodiments, the radiation 14 may include electromagnetic radiation, such as X-ray radiation, or beta radiation, or gamma radiation. A portion of the radiation 14, generally termed as attenuated radiation 18, passes through the target 16. More specifically, the internal features of the target 16 at least partially reduce the intensity of the radiation 14. For example, one internal feature of the target 16 may pass less or more radiation than another internal...

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Abstract

A scintillator composition includes a matrix material, where the matrix material includes an alkaline earth metal and a lanthanide halide. The scintillator composition further includes an activator ion, where the activator ion is a trivalent ion. In one embodiment, the scintillator composition includes a matrix material represented by A2LnX7, where A includes an alkaline earth metal, Ln includes a lanthanide ion, and X includes a halide ion. In another embodiment, the scintillator composition includes a matrix material represented by ALnX5, where A includes an alkaline earth metal, Ln includes a lanthanide ion, and X includes a halide ion. In these embodiments, the scintillator composition includes an activator ion, where the activator ion includes cerium, or bismuth, or praseodymium, or combinations thereof.

Description

CROSS REFERENCE TO RELATED APPLICATION[0001]This application is a divisional of U.S. patent application Ser. No. 11 / 172,533, entitled “HIGH ENERGY RESOLUTION SCINTILLATORS HAVING HIGH LIGHT OUTPUT”, filed Jun. 29, 2005, which is herein incorporated by reference in its entirety.BACKGROUND[0002]The invention relates generally to the field of imaging systems and, more particularly, to scintillator compositions for use in high-energy radiation detectors.[0003]High-energy radiation based imaging systems, such as positron emission tomography (PET), generally employ a scintillator detector having a plurality of pixels typically arranged in a circular array. Each such pixel comprises a scintillator cell coupled to a photomultiplier tube. In PET, a chemical tracer compound having a desired biological activity or affinity for a particular organ is labeled with a radioactive isotope that decays by emitting a positron. Subsequently, the emitted positron interacts with an electron giving out two...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): G01T1/20
CPCC09K11/7705C09K11/7773C04B35/5152C04B2235/3206C04B2235/3208C04B2235/3213C04B2235/3215C04B2235/3224C04B2235/3225C04B2235/3229
Inventor SRIVASTAVA, ALOK MANIDUCLOS, STEVEN JUDECLARKE, LUCAS LEMARCOMANZO, HOLLY ANNDENG, QUN
Owner GENERAL ELECTRIC CO
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