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Method and apparatus for detecting and correcting motion in list mode pet data using gating signals

A mode and data technology, applied in image data processing, projection reproduction, 2D image generation, etc., can solve problems such as image noise.

Active Publication Date: 2016-09-21
KONINK PHILIPS ELECTRONICS NV
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  • Claims
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Problems solved by technology

The resulting image will be noisy, making it difficult or impossible to identify small lesions

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  • Method and apparatus for detecting and correcting motion in list mode pet data using gating signals
  • Method and apparatus for detecting and correcting motion in list mode pet data using gating signals

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Embodiment Construction

[0024] refer to figure 1 , an anatomical scanner such as CT scanner 10 generates CT data from which CT reconstruction processor 12 reconstructs a 3D anatomical image of a reference motion phase or a series of anatomical images of a series of reference motion phases from the CT data. The reference images are stored in memory or cache 14 and converted into attenuation maps which are stored in attenuation map memory or cache 16 for use during reconstruction of PET or other functional images.

[0025] A functional imaging system, such as a PET imaging system, includes a gantry in which a region of interest of a subject is positioned. In PET and other nuclear medicine systems, a radiopharmaceutical tracer is injected into a subject. The PET gantry system detects a series of detected radiation events that define the endpoints of a series of lines of response (LORs). The clock 22 time-stamps detection events with an associated detection time. Coincidence detector 24 detects pairs ...

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Abstract

A PET scanner (20, 22, 24, 26) generates multiple time-stamped Lines of Response (LOR). The motion detector (30) detects the motion state of the subject, such as motion phase or motion amplitude, during the acquisition of each LOR. The classification module (32) classifies the LORs according to the motion states, and the reconstruction processor (36) reconstructs the LORs into high spatial resolution, low temporal resolution images of the corresponding motion states. The motion estimator module (40) determines motion transformations that transform the LORs to common motion states. The reconstruction module (50) reconstructs the motion-corrected LOR into static images or dynamic images, a series of high temporal resolution, high spatial resolution images.

Description

technical field [0001] This application relates to the field of diagnostic imaging. The present invention finds particular application in use in connection with positron emission tomography (PET) systems collecting data in tabular mode and will be described with particular reference thereto. However, it is to be appreciated that the following may also apply to other types of nuclear imaging, combined nuclear / CT imaging, CT imaging, etc. Background technique [0002] US2010 / 01666274A1 discloses a medical imaging system that corrects motion in reconstructed images using data used to reconstruct the images. The medical imaging system includes a plurality of detectors for detecting electron-positron annihilation events, which identify substantially simultaneous pairs of concurrent events in electron-positron annihilation events; and a response line processor, which processes the events and identifies each concurrent The response line for an event in an event pair. The medical...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T11/00
CPCG06T11/005G06T2211/412G06T11/003
Inventor P·奥利维尔A·珀金斯B·张C-H·通
Owner KONINK PHILIPS ELECTRONICS NV
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