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Parameter imaging method of dynamic Positron Emission Tomography (PET) images

An imaging method and dynamic technology, applied in image data processing, image enhancement, instruments, etc., can solve problems such as inability to remove image noise, parameter image quality is not high, and dynamic PET image time-series correlation is not considered.

Active Publication Date: 2013-06-05
SOUTHERN MEDICAL UNIVERSITY
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Problems solved by technology

[0005] However, most of the existing filtering techniques are based on PET images of a single time frame for noise reduction processing, without considering the correlation of the time series of dynamic PET images
Due to the low signal-to-noise ratio of dynamic PET images, the existing single-frame-based filtering techniques cannot remove image noise well, so that the quality of parameter images estimated from dynamic PET images is not high

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  • Parameter imaging method of dynamic Positron Emission Tomography (PET) images
  • Parameter imaging method of dynamic Positron Emission Tomography (PET) images
  • Parameter imaging method of dynamic Positron Emission Tomography (PET) images

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Embodiment 1

[0031] A parameter imaging method of a dynamic PET image, comprising the steps in turn:

[0032] (1) Obtain the projection data of all time frames of dynamic PET. The method of obtaining the projection data of all time frames of the dynamic PET is common knowledge in the art, and will not be repeated here.

[0033] (2) The PET reconstruction method is used for image reconstruction on the dynamic PET projection data obtained in step (1), and a dynamic PET image is obtained. The PET reconstruction method can be set as a filtered back projection method or an iterative reconstruction method. Of course, the PET reconstruction method can also be set to other methods according to the actual situation, and is not limited to the situation in this embodiment.

[0034] (3) Design a dynamic PET image filter to perform noise reduction processing on the dynamic PET image acquired in step (2).

[0035] The form of the filter designed in step (3) is as follows: ,in, For dynamic PET ima...

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Abstract

A parameter imaging method of dynamic Positron Emission Tomography (PET) images successively comprises the following steps: (1) acquiring projection data of all time frames of dynamic PET; (2) adopting a PET rebuilding method to rebuild images for the dynamic PET projection data acquired in the step (1) to acquire the dynamic PET images; (3) designing a dynamic PET image filter to carry out a noise reduction treatment on the dynamic PET images acquired in the step (2); the form of the filter is a weight factor; (4) carrying out parameter image on the dynamic PET images acquired in the step (3) after the noise reduction treatment. Due to the fact that the dynamic PET image filter is designed, pattern noise can be effectively eliminated, and the quality of the parameter image can be improved.

Description

technical field [0001] The invention relates to the technical field of image processing of medical images, in particular to a parametric imaging method of dynamic PET images. Background technique [0002] Positron Emission Tomography (PET), as an outstanding representative of functional molecular imaging, is being more and more widely used in clinical diagnosis, especially early diagnosis. [0003] Dynamic PET imaging can non-invasively provide the human physiological and biochemical information needed by clinicians by imaging the distribution and activity changes of injected radiotracers in the human body, and then conduct early diagnosis and treatment of potential diseases . However, due to the short scanning time and low photon count of dynamic PET, and the acquisition of data during the scanning process is easily affected by noise and other physical factors, the signal-to-noise ratio of the reconstructed dynamic PET image is low, resulting in the kinetic analysis res...

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Application Information

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IPC IPC(8): G06T5/00
Inventor 马建华边兆英黄静路利军陈武凡
Owner SOUTHERN MEDICAL UNIVERSITY