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Methods and systems for emission computed tomography image reconstruction

An image reconstruction, image technology, applied in the field of medical image reconstruction, to achieve the effect of suppressing motion artifacts and high signal-to-noise ratio

Active Publication Date: 2018-06-29
SHANGHAI UNITED IMAGING HEALTHCARE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when the scan is performed on the chest or upper abdomen, the movement of the lungs or the subject's heart can cause severe motion artifacts in the final generated ECT image

Method used

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  • Methods and systems for emission computed tomography image reconstruction
  • Methods and systems for emission computed tomography image reconstruction
  • Methods and systems for emission computed tomography image reconstruction

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Embodiment 1

[0164] Figure 7-A , Figure 7-B with Figure 7-C They are the ECT images of the target scanning parts of the subject obtained by using different image reconstruction methods according to an embodiment of the present application. For the convenience of display, a 2D image is used for illustration. in, Figure 7-A It is the ECT image obtained by reconstructing the projection data based on the time domain extension function in this embodiment; Figure 7-B For this embodiment, the ECT image obtained by reconstructing projection data using a non-gated technique (such as a method based on a point spread function); Figure 7-C For this embodiment, the projection data is reconstructed using a uniform gating method to obtain an ECT image.

[0165] Figure 7-B The ECT image has a low noise level (high signal-to-noise ratio), but the resolution of the reconstructed image is poor. Figure 7-C The ECT image has high image resolution but high noise level (poor signal-to-noise ratio)...

Embodiment 2

[0167] Figure 8-A , Figure 8-B with Figure 8-C They are the ECT images (2D / two-dimensional forms) of the target scanning parts of the subject obtained by using different image reconstruction methods according to an embodiment of the present application. Figure 8-AIt is the ECT image obtained by reconstructing the projection data based on the time domain extension function in this embodiment; Figure 8-B For this embodiment, the ECT image obtained by reconstructing projection data using a non-gated technique (such as a method based on a point spread function); Figure 8-C For this embodiment, the projection data is reconstructed using a uniform gating method to obtain an ECT image. Figure 8-B The ECT image has a low noise level (high signal-to-noise ratio), but the resolution of the reconstructed image is poor. Figure 8-C The ECT image has high image resolution but high noise level (poor signal-to-noise ratio). Figure 8-A ECT images with good resolution and low nois...

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Abstract

The present disclosure relates to systems and methods for reconstructing an Emission Computed Tomography (ECT) image. The systems, having at least one machine each of which has at least one processorand storage, may perform the methods to obtain ECT projection data, the ECT projection data corresponding to a plurality of voxels; determine a plurality of gate numbers for the plurality of voxels, the plurality of gate numbers relating to motion information of the plurality of voxels; and reconstruct an ECT image based on the ECT projection data and the plurality of gate numbers.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to US Application No. 15 / 386,048, filed December 21, 2016, the entire contents of which are hereby incorporated by reference. 【Technical field】 [0003] The present application relates to the technical field of medical image reconstruction, in particular to an emission computed tomography (Emission Computed Tomography, ECT) image reconstruction method and system. 【Background technique】 [0004] Emission Computed Tomography (ECT) is widely used in medical diagnosis and other fields. The types of ECT mainly include Positron Emission Computed Tomography (PET) and Single-Photon Emission Computed Tomography (Single-Photon Emission Computed Tomography, SPECT). The ECT image of the subject can be obtained through the ECT scanning equipment, and the diagnosis of tumor, heart and brain diseases can be obtained through the ECT image. However, when a scan is performed on the chest or upper abdom...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B6/03
CPCA61B6/032A61B6/5264A61B6/5205G06T11/006A61B6/037G06T7/207A61B5/7292A61B5/7289
Inventor 冯涛朱闻韬李弘棣
Owner SHANGHAI UNITED IMAGING HEALTHCARE
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