Positive computerized tomography restoration method for multi-phase horizontal set

A technology of positron tomography and multi-phase level set, which can be used in computer tomography scanners, echo tomography, etc. It can solve the problems of unclear image margins, loss of system dead time, and complicated operations, and achieve edge artifact elimination. , the effect of eliminating noise and improving quality
CN1640361AInactive Publication Date: 2005-07-20SOUTHEAST UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SOUTHEAST UNIV
Publication Date
2005-07-20
Estimated Expiration
Not applicable · inactive patent

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Abstract

The present invention discloss a positron tomographic scanning image reconstruction method of multiphase level set. Said method mainly includes the following steps: obtaining projection data, defining number of level set functions, using K mean cluster method to obtain initial concentration value of image, calculating to obtain object function for reconstructing image, solving partial derivatives, obtaining current level set evolve correction, updating reconstructed image, obtaining estimated image and concentration estimated value, and converging reconstructed image. Said invention has the advantages of eliminating noise, retaining edge and eliminating edge pseudo-image, etc.
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Description

technical field

[0001] The invention relates to an image reconstruction method, in particular to a multiphase level set positron emission tomography reconstruction method. technical background

[0002] Positron emission computed tomography is mainly used in the early prediction and prevention of tumors and cancers in medical diagnosis and clinical research, and has the function of predicting the diagnosis of various brain tumors and cancer lesions. Diagnosis doctors usually manually segment the reconstructed image to understand the location and shape of the tumor. Since the projection data detected by the PET scanner is incomplete, and the reconstruction of the tomographic image is a pathological inverse operation in mathematics, the reconstructed image usually has noise and edge artifacts. Segmentation has the defects of unclear image margins, low resolution, and cumbersome operations. There are many reasons for positron emission tomography (PET)...

Claims

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