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Method and device for obtaining normalized correction factor and medical imaging method

A correction factor and normalization technology, applied in the field of image processing, can solve the problems of inaccurate normalization correction factor, large calculation error interference and residual, residual uneven components of reconstructed image, etc.

Active Publication Date: 2020-10-02
SHANGHAI UNITED IMAGING HEALTHCARE
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Problems solved by technology

[0005] Due to the large calculation error of each component of normalization correction and their mutual interference and residual, the normalization correction factor is not accurate enough, and the reconstructed image of a uniform phantom may still have a small amount of non-uniform components

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  • Method and device for obtaining normalized correction factor and medical imaging method
  • Method and device for obtaining normalized correction factor and medical imaging method
  • Method and device for obtaining normalized correction factor and medical imaging method

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Embodiment Construction

[0061] In order to better understand the technical solutions of the present invention, the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0062] It should be clear that the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0063] Terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. As used in the embodiments of the present invention and the appended claims, the singular forms "a", "said" and "the" are also intended to include the plural forms unless the context clearly indicates otherwise.

[0064] It should be understood that although the...

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Abstract

An embodiment of the invention provides a normalized correction factor obtaining method and device and a medical imaging method, relates to the technical field of image processing and can reduce calculation errors of each element of normalized correction and mutual interference and residues. The mormalized correction factor obtaining method comprises the following steps: in the homogeneous phantom decay process, obtaining activity concentration of a homogeneous phantom under specific activity, phantom position, scanning data and a normalized correction factor; according to the activity concentration and the phantom position, obtaining a first reconstructed image of the homogeneous phantom, and carrying out normalized correction on the scanning data by utilizing normalized correction factor to obtain a second reconstructed image of the homogeneous phantom; mapping the first reconstructed image and the second reconstructed image to chordal graph domains respectively; carrying out projection comparison to obtain a correction term of the normalized correction factor; and according to the correction term, correcting the normalized correction factor under the specific activity. The technical scheme is suitable for the correction process of the normalized correction factor.

Description

【Technical field】 [0001] The present invention relates to the technical field of image processing, in particular to a method and device for obtaining a normalized correction factor and a medical imaging method. 【Background technique】 [0002] Positron Emission Tomography (PET) is a relatively advanced clinical examination imaging technology in the field of nuclear medicine. In the PET imaging process, the detection efficiency of the scintillation crystal detector and the detection efficiency of the response line composed of the scintillation crystal pair are affected by many factors, which may lead to artifacts and inaccurate quantification of the obtained PET reconstruction image, so it is necessary to Normalization correction for detection efficiency was performed by a normalization correction factor. [0003] The traditional normalization correction is based on the uniform phantom scanning to obtain the scan data of the list mode. After the physical correction is perform...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T5/00G06T7/00
CPCG06T5/006G06T7/0012G06T2207/10104
Inventor 唐嵩松董晓霞
Owner SHANGHAI UNITED IMAGING HEALTHCARE
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