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Data acquisition device, pair annihilation gamma ray detector, and pair annihilation gamma ray detection method

A gamma ray and data acquisition technology, which is applied in measuring devices, radiation measurement, X/γ/cosmic radiation measurement, etc., can solve the problems of limited ability of time estimation

Active Publication Date: 2014-06-11
TOSHIBA MEDICAL SYST CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Also, the ability for good time estimation is limited because the best signal is degraded when tilts interact

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  • Data acquisition device, pair annihilation gamma ray detector, and pair annihilation gamma ray detection method
  • Data acquisition device, pair annihilation gamma ray detector, and pair annihilation gamma ray detection method
  • Data acquisition device, pair annihilation gamma ray detector, and pair annihilation gamma ray detection method

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Embodiment Construction

[0039] Embodiments related to the present application will be described in detail below. As described above, the present application provides a data acquisition device, an annihilation gamma ray detector, and an annihilation gamma ray detection method capable of reducing channel count in semiconductor-based PET. Specifically, a method is described in this application that enables the use of smaller trigger regions, very high count rate capabilities, and higher positioning accuracy while cutting channel counts. The disclosed embodiments provide for an optimal system design by having a portion of the circuitry dedicated in time and energy estimation and other portions of the circuitry located in the array, while providing greater channel count reduction.

[0040] Therefore, according to the first embodiment according to the present application, a data acquisition device for a gamma ray detector is provided. The data acquisition device includes: an adding circuit configured to a...

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Abstract

According to an embodiment, an adder channel adds signals from an array of sensors (301) and digitizes the same, and then extracts timing and energy information. A delay-and-add channel includes individual delay lines (305) which each introduce a known delay for a respective sensor to create a time signature for said sensor (301), each being followed by an adder circuit (303) for adding delayed signals. The delay-and-add channel digitizes using a high-speed counter (509) and extracts position information. Start and stop signals for the counter are output when the adder channel output and the delay-and-add channel output respectively exceed a pulse ID threshold respectively. The pulse ID threshold is selected so that Compton scattering is minimized and an optical peak event is not removed.

Description

technical field [0001] The present disclosure generally relates to an apparatus and method for channel count reduction in Positron Emission Tomography (PET). More specifically, the present disclosure relates to an apparatus and method for reducing channel counts in semiconductor-based Positron Emission Tomography (PET) by making readouts from photodetectors into data sets. Background technique [0002] PET imaging first administers (mostly injected, but also includes inhalation and ingestion) radioactive pharmaceuticals to the subject, and then the physical and biomolecular properties of the pharmaceuticals accumulate in specific parts of the human body. The actual spatial distribution, the intensity of the point or area of ​​accumulation, and the dynamics of handling from delivery to capture to eventual expulsion may all be factors of clinical importance. In this process, positron emitters attached to pharmaceuticals emit positrons according to the physical properties of t...

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Application Information

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IPC IPC(8): G01T1/161
CPCG01T1/208G01T1/1647
Inventor 丹尼尔·加格农萨克恩·S·云纳卡尔
Owner TOSHIBA MEDICAL SYST CORP