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PET imaging system and method for calculating response line for intergranular event

A response line and event technology, applied in the fields of radiological diagnosis instruments, applications, medical science, etc., can solve problems such as incorrect response line calculation and degradation of PET image image quality.

Inactive Publication Date: 2019-10-25
GENERAL ELECTRIC CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This leads to an incorrect line of response (LOR) calculation, which in turn causes a reduction in the image quality of the resulting PET image calculated using the incorrect LOR
Current PET imaging systems do not distinguish between photoelectric interactions between gamma rays in the PET detector and crystals (single crystal events) and Compton scattering interactions (intergranular events)

Method used

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  • PET imaging system and method for calculating response line for intergranular event
  • PET imaging system and method for calculating response line for intergranular event
  • PET imaging system and method for calculating response line for intergranular event

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Embodiment Construction

[0034] The following detailed description of certain embodiments is better understood when read in conjunction with the accompanying figures. To the extent the figures illustrate the functional block diagrams of various embodiments, the functional blocks are not necessarily indicative of the division between hardware circuitry. Thus, for example, one or more functional blocks (eg, a processor or memory) may be implemented in a single piece of hardware (eg, a general-purpose signal processor or random access memory, hard disk, etc.) or in multiple pieces of hardware. Similarly, a program may be a stand-alone program, may be incorporated into an operating system as a subroutine, may be a function of an installed software package, and so on. It should be understood that the various embodiments are not limited to the arrangements shown in the drawings.

[0035] As used herein, the terms "system", "unit" and "module" include hardware and / or software systems that operate to perform...

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Abstract

A positron emission tomography (PET) imaging system and method for calculating a response line (LOR) include accessing a flood map of a PET detector and identifying a first region corresponding to a first crystal in the flood map. The system and method include identifying a second region corresponding to a second crystal in a flood map. The system and method include generating a lookup table (LUT), wherein the LUT associates a position in the first region with the first crystal and a position in the second region with the second crystal. The system and method include detecting an event havingan energy-weighted location in the second region. The system and method include identifying the event as an intergranular event based on the energy-weighted location; assigning the interaction point in the first crystal to the event; and using the interaction point in the first crystal to calculate the LOR for the event.

Description

technical field [0001] The present disclosure generally relates to positron emission tomography (PET) imaging systems and methods for computing line of response (LOR) for intergranular events. Background technique [0002] In positron emission tomography (PET) imaging, a PET detector typically includes multiple crystals coupled to multiple photosensors to detect radiation emanating from the patient. For example, an array of crystals can be used to detect gamma rays produced in a patient. Gamma rays are produced when positrons emitted from radiopharmaceuticals injected into the patient collide with electrons. The electron / positron interaction results in an annihilation event that emits two gamma rays at 180 degrees from each other. Crystals in PET detectors receive gamma rays and generate photons in response to the gamma rays. Photons generated in crystals typically have wavelengths in the visible spectrum. A photosensor coupled to the scintillator crystal is configured t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B6/03
CPCA61B6/037A61B6/461A61B6/5205
Inventor 金昌龙
Owner GENERAL ELECTRIC CO