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A virtual framework for distributed list-mode time-of-flight reconstruction with continuous bed movement

A virtual frame and frame technology, applied in the field of medical imaging, can solve the problems of increasing computing resource bottlenecks, binning data into sinusoids, delaying image reconstruction, etc., to improve patient comfort, uniform axial sensitivity profile, and shorten scan delay Effect

Active Publication Date: 2017-09-08
KONINKLJIJKE PHILIPS NV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the data cannot be binned into sinograms until all the data has been collected
Thus, while the overall data acquisition time for PET can be reduced, image reconstruction is postponed until the end using intensive computing resources
Typically, the patient is not released from the scanner until the reconstructed image has been received and approved, causing a bottleneck in the workflow
Additionally, combining images from other modalities with the reconstructed image is delayed, which increases the computational resource bottleneck

Method used

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  • A virtual framework for distributed list-mode time-of-flight reconstruction with continuous bed movement
  • A virtual framework for distributed list-mode time-of-flight reconstruction with continuous bed movement
  • A virtual framework for distributed list-mode time-of-flight reconstruction with continuous bed movement

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Embodiment Construction

[0022] refer to figure 1 , schematically illustrates an embodiment of CBM utilizing a virtual frame TOF-PET system (1). The system 1 includes a TOF-PET scanner 2 shown in cross-section. Non-TOF PETs are also contemplated. The scanner is configured with an object support or bed 3 that moves in continuous motion past a PET detector array 4 . The detector is arranged around an opening or bore 6 through which the object support is moved in an axial direction 8 . The arrangement of detectors 4 around the opening defines a field of view 10 . The object support 3 supports the object 12 to be injected with radiopharmaceutical. As the object support 3 moves through the field of view 10, the radiopharmaceutical decays as it is taken up by tissue and then eluted. When the radiopharmaceutical decays, a positron is emitted, which causes an annihilation event that emits a gamma photon as a coincident pair. Coincidence pairs of gamma photons from field of view 10 are detected by detect...

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Abstract

A positron emission tomography (PET) system includes a memory (18), a subject support (3), a categorizing unit (20), and a reconstruction unit (22). The memory (18) continuously records detected coincident event pairs detected by PET detectors (4). The subject support (3) supports a subject and moves in a continuous movement through a field of view (10) of the PET detectors (4). The categorizing unit (20) categorizes the recorded coincident pairs into each of a plurality of spatially defined virtual frame (14). The reconstruction unit (22) reconstructs the categorized coincident pairs of each virtual frame into a frame image and combines the frame images into a common elongated image.

Description

technical field [0001] The following generally relates to medical imaging. The invention finds particular application in connection with positron emission tomography (PET), image reconstruction, and continuous bed movement (CBM), and will be described with particular reference thereto. However, it should be understood that the present invention finds particular application in other usage scenarios as well, and is not necessarily limited to the aforementioned applications. Background technique [0002] In PET imaging, a detector array detects pairs of gamma photons emitted from positron annihilation events in an object. The detected gamma photon pairs determine the line of response (LOR). Time-of-flight (TOF) PET adds an estimate of the onset location of the annihilation event based on the average time difference between the detection of each photon pair. The estimated result is the distance along the LOR. Detected coincident pairs and TOF information can be recorded in a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01T1/29G01T1/164G06T11/00
CPCA61B6/037G01T1/1647G01T1/2985G06T11/005
Inventor B·张C-H·通J·P·柯林斯
Owner KONINKLJIJKE PHILIPS NV
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