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Image attenuation correction method and image attenuation correction device in position emission computed tomography (PET) system

A technology of attenuation correction and image, applied in the field of medical image processing, to achieve the effect of reducing scanning time

Active Publication Date: 2013-07-03
SHENYANG NEUSOFT PAISITONG MEDICAL SYST
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Problems solved by technology

[0004] However, using the above-mentioned attenuation correction method will still require more than 10 minutes for a bed, and more than an hour if the whole body scan of the patient is performed, and there is still the problem of low efficiency of attenuation correction for medical images scanned by PET equipment Therefore, how to propose an innovative attenuation correction method for medical images, which can ensure the accuracy of the attenuation-corrected image while reducing the transmission scanning time, thereby improving the input-output ratio of the equipment, and reducing the patient's burden due to scanning. psychological and physical discomfort

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  • Image attenuation correction method and image attenuation correction device in position emission computed tomography (PET) system
  • Image attenuation correction method and image attenuation correction device in position emission computed tomography (PET) system
  • Image attenuation correction method and image attenuation correction device in position emission computed tomography (PET) system

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[0053] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0054] see figure 1 , which shows a flow chart of an embodiment of an attenuation correction method applied to a medical image in a PET system according to the present invention, which may include the following steps:

[0055] Step 101: Obtain transmission scanning chord data of the current PET equipment.

[0056] For a PET device, the embodime...

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Abstract

The invention discloses an image attenuation correction method and an image attenuation correction device in position emission computed tomography (PET) system. The image attenuation correction method includes the steps of: obtaining transmission scanning chordal graph data of current PET equipment, reconstructing the transmission scanning chordal graph data by adopting a Bayesian model-based ordered subset expectation maximization (OSEM-B) method and a filtered back projection (FBP) method to obtain an OSEM-B attenuation image and a first FBP attenuation image, weighting the OSEM-B attenuation image and the first FBP attenuation image to acquire an effective attenuation image; and performing attenuation correction on emission scanning chordal graph data of the current PET device by adopting an attenuation chordal graph generated based on the effective attenuation image. The method and device disclosed in the embodiments of the present invention are capable of making the quality of an attenuation image reach the quality precision of long-time transmission scanning, and at the same time reducing the time of transmission scanning.

Description

technical field [0001] The invention relates to the field of medical image processing, in particular to an attenuation correction method and device applied to medical images in a PET system. Background technique [0002] During the scanning process of PET (Positron Emission Computed Tomography, positron emission computed tomography) equipment, each patient generally needs to undergo two scans, one is an emission (Emission) scan, and the other is a transmission (Transmission) scan. The data collected by the Emission scan generally reflects the distribution of the drug in the patient's body, but it has not been corrected for attenuation, so there is a problem of inaccurate quantification; Scanned data are attenuation corrected. When using PET equipment for heart examination, Emission scan data can reflect the distribution of drugs in the patient's body, and the scan takes about 4 minutes; while Transmission scan takes about 30 minutes, so that a relatively accurate scan image...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00
CPCG06T11/005G06T5/77G06T2207/10104G06T2207/20004G06T2207/30004
Inventor 孙智鹏
Owner SHENYANG NEUSOFT PAISITONG MEDICAL SYST
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