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Method and device for PET delayed sweep

A technology of delayed scanning and CT scanning, which is applied in the field of PET delayed scanning, can solve the problems that the correction effect cannot be realized, and the image quality needs to be improved, so as to achieve the effect of improving quality and accurate attenuation correction

Active Publication Date: 2018-09-21
SHENYANG INTELLIGENT NEUCLEAR MEDICAL TECH CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, the above method cannot achieve a good correction effect, and the image quality needs to be improved

Method used

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  • Method and device for PET delayed sweep
  • Method and device for PET delayed sweep
  • Method and device for PET delayed sweep

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Embodiment Construction

[0036] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatuses and methods consistent with aspects of the present disclosure as recited in the appended claims.

[0037] Before the PET examination, the patient can be injected with radiopharmaceuticals, and the photons produced by the radiopharmaceuticals in the patient's body are detected when the radiation is annihilated, and the PET image can be obtained by image reconstruction based on the detected PET data. However, during the PET imaging process, due to the influence of attenuation factors ...

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Abstract

The invention discloses a method and device for PET delayed sweep. The method comprises the steps of obtaining a first attenuation graph and an initial attenuation graph through first-time scanning, wherein the first-time scanning includes PET scanning and CT scanning, a CT image obtained through CT scanning is converted to obtain a first attenuation graph, and the first attenuation graph or PET data obtained by PET scanning is rebuilt to obtain the initial attenuation graph; obtaining an estimated attenuation graph through second-time scanning; determining the pixel displacement relation between the estimated attenuation graph scanned by second-time scanning and the initial attenuation graph obtained by first-time scanning; according to the first attenuation graph and the pixel displacement relation, obtaining a second attenuation graph obtained by second-time scanning; according to the second attenuation graph, performing attenuation correction on the PET data obtained by second-timescanning, and performing rebuilding to obtain a PET image.

Description

technical field [0001] The present disclosure relates to medical imaging technology, in particular to a method and device for PET delayed scanning. Background technique [0002] With the advancement of science and technology and the continuous innovation of products, positron emission and X-ray computed tomography equipment (PET / CT, Positron Emission Tomograph / Computer Tomography) is more and more widely used by hospitals. Pre-screening has played a positive role. According to clinical surveys, there are nearly 70% of PET / CT examinations, and patients need PET delayed scans, that is, after a PET scan and a CT scan, the patient needs to undergo a PET scan and a CT scan again at intervals, so that the patient not only suffers from Radiation doses from radiopharmaceuticals, but also increased radiation from CT scans. [0003] In order to reduce the radiation dose received by the patient, in the current technology, the CT scan can no longer be performed during the delayed PET ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B6/03
CPCA61B6/037
Inventor 刘月孙智鹏李明吕斌
Owner SHENYANG INTELLIGENT NEUCLEAR MEDICAL TECH CO LTD