Image reconstruction, projection data evaluating method and X ray CT device

A technology of projection data and evaluation method, applied in image data processing, calculation, image enhancement, etc., can solve the problem of poor reconstructed image quality and achieve good quality results
CN1989909AInactive Publication Date: 2007-07-04GECHINA RES & DEV CENT
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
GECHINA RES & DEV CENT
Publication Date
2007-07-04
Estimated Expiration
Not applicable · inactive patent

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Abstract

A method which can reconstruct good quality images even without corresponding data according portion projection data of scanning and X-ray CT devices which can process said images reconstruction. It replaces the data points A without actual measuring projection data by its mirror point A 'with actual measuring projection data in image channel space collecting part of scanning actual measuring projection data to forming complete scanning projection data, reconstructs images according complete scanning projection data; when the mirror point A 'has not actual measuring projection data, it makes use of the actual measuring projection data of its near several data points B,C to building in data.
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Description

[0001] This application is a divisional case of the parent case (application number: 03164845.2). technical field

[0002] The present invention relates to an image reconstruction method, a projection data (data) evaluation method, and an X-ray computed tomography [CT (Computed Tomography)] device, and in particular relates to projection data based on partial scan (partial san) A method of reconstructing an image, a method of evaluating normality of projection data, and an X-ray CT apparatus for performing such image reconstruction or evaluation of projection data. Background technique

[0003] In an X-ray CT device, only half-scan (half scan) measured projection data is collected in the image channel (view-channel) space, and the relative data contained in the measured projection data is used to supplement the full scan (full scan) Insufficient parts, reconstruct the image. (For example, JP-A-4-84940 (page 34, Figures 2-3)).

[0004] Because the data points in the image c...

Claims

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