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Pet image reconstruction method and system

An image reconstruction and image technology, applied in the field of PET image reconstruction method and system, can solve the problem of large image noise at both ends of the axial direction, and achieve the effect of reducing image noise and improving image quality

Active Publication Date: 2021-03-16
SHANGHAI UNITED IMAGING HEALTHCARE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In actual operation, due to the less data collected at the two ends of the axial direction, the noise of the images at both ends of the axial direction of each bed is too large

Method used

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  • Pet image reconstruction method and system
  • Pet image reconstruction method and system

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Embodiment Construction

[0034] In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0035] In the following description, many specific details are set forth in order to fully understand the present invention, but the present invention can also be implemented in other ways than those described here, so the present invention is not limited by the specific embodiments disclosed below.

[0036] figure 1 It is a flowchart of a PET image reconstruction method according to an embodiment of the present invention. Such as figure 1 As shown, the PET image reconstruction method of the present embodiment includes:

[0037] Execute step S1, perform PET scanning on the scanning object at the first bed position, and obtain the first PET data and the first PET image;

[0038] Executing step S2, performing PET scanning on the scann...

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Abstract

The invention provides a PET image reconstruction method, which includes the following steps: performing a PET scan on a scanned object at a first bed to obtain first PET data and a first PET image; performing a PET scan on the scanned object at a second bed. , obtain the second PET data and the second PET image, the second bed and the first bed have an overlapping area; extract the third PET data located in the overlapping area from the first PET data; from the Extract the fourth PET data located in the overlapping area from the second PET data; merge the third PET data and the fourth PET data, and use the merged data to reconstruct a third PET image; combine the first PET image and the fourth PET data The second PET image and the third PET image are spliced ​​to obtain a fourth PET image of the scanned object. The present invention makes full use of existing data, can reduce image noise and improve image quality in overlapping areas.

Description

technical field [0001] The present invention mainly relates to the technical field of Positron Emission Tomography (PET), in particular to a PET image reconstruction method and system. Background technique [0002] At present, positron emission tomography devices generally have a multi-ring structure, that is, detectors are arranged in a polygonal shape on each ring, and multiple detector rings are connected to each other to approximately form a hollow cylinder. Place the patient inside the detector ring while scanning. In the 3D acquisition mode, the sensitivity of each slice of the system in the axial direction presents a triangular distribution with a high middle and low sides, that is, the slices located at both ends of the axial direction collect less data while the slices located in the middle of the axial line collect less data at the same time. There are a lot of data; correspondingly, for a single-bed reconstruction image, the signal-to-noise ratio of the image sho...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T5/00G06T15/06
CPCG06T11/001G06T15/06G06T2207/10104G06T2215/06G06T2211/416G06T5/70
Inventor 吕杨
Owner SHANGHAI UNITED IMAGING HEALTHCARE