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Method for modeling and accounting for cascade gammas in images

An imaging method and cascading technology, applied in 2D image generation, image data processing, radiation measurement, etc., can solve problems such as uninterpreted cascade gamma, and achieve the effect of fast reconstruction

Active Publication Date: 2016-03-23
KONINKLJIJKE PHILIPS NV +2
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  • Claims
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Problems solved by technology

[0007] A challenge with the aforementioned method of scatter correction is that it does not account for cascaded gamma

Method used

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  • Method for modeling and accounting for cascade gammas in images
  • Method for modeling and accounting for cascade gammas in images
  • Method for modeling and accounting for cascade gammas in images

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Embodiment Construction

[0020] The present invention uses Monte Carlo (MC) simulation-based techniques to predict the propensity for cascading gamma rays (also known as prompt gamma) in positron emission tomography (PET) data to account for cascading gamma rays during image reconstruction. Gamma and improve the accuracy of the resulting image. Cascade gamma is produced by certain radionuclides such as rubidium 82( 82 Rb), iodine 124 ( 124 I) and yttrium 86 ( 86 Y)) gamma rays other than positrons (also called "gamma") emitted during their decay. Since techniques based on MC simulation can also be used for single scatter simulation and correction, this cascaded gamma correction can be incorporated into single scatter simulation and correction algorithms.

[0021] refer to figure 1 , the multimodal imaging system 10 includes a PET scanner 12 to generate raw PET data using cascaded gamma-emitting radionuclides. Such radionuclides can include, for example 82 Rb, 124 I and / or 86 Y. The PET scanne...

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Abstract

An imaging method and corresponding system (10) account for cascade gammas. Event data describing detected gamma rays emitted from a target volume of a subject are received. The detected gamma rays include cascade gammas emitted from a radionuclide within the target volume. Cascade and annihilation gamma emissions from the target volume and coincidence detection of the imaging system (10) are simulated using a Monte Carlo (MC) simulation technique to generate a cascade dataset comprised of annihilation coincidence events and cascade coincidence events. The event data is reconstructed into an image representation of the target volume with correction of cascade coincidence using the relationship between the annihilation coincidence events and the cascade coincidence events in the cascade data set.

Description

technical field [0001] This application relates generally to positron emission tomography (PET). It finds particular application in connection with PET acquisition, and the present application will be described with particular reference to PET acquisition. However, it should be understood that the present application is also applicable to other usage scenarios, and is not necessarily limited to the aforementioned applications. Background technique [0002] Certain positron-emitting radionuclides emit gamma rays (also known as "gamma") in addition to positrons during their decay. This extra gamma is called cascaded gamma or instantaneous gamma. Such radionuclides include, for example, rubidium 82 ( 82 Rb), iodine 124 ( 124 I) and yttrium 86 ( 86 Y). The cascade gamma(s) are emitted nearly simultaneously with the positron, making it difficult to separate from the desired annihilation pair. [0003] The cascaded gamma(s) lead to contamination of the obtained PET data, wh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T11/00G01T1/16
CPCG01T1/1647G01T1/2985G06T11/005G06F30/20G06F17/18
Inventor J·A·科尔特姆尔R·F·穆梓克J·耶
Owner KONINKLJIJKE PHILIPS NV
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