IMAGE RECONSTRUCTION METHOD, IMAGE RECONSTRUCTION PROGRAM, AND TOMOGRAPHY DEVICE EQUIPPED WITH SAME

Title:

IMAGE RECONSTRUCTION METHOD, IMAGE RECONSTRUCTION PROGRAM, AND TOMOGRAPHY DEVICE EQUIPPED WITH SAME

Document Type and Number:

WIPO Patent Application WO/2017/154217

Kind Code:

A1

Abstract:

In the image reconstruction method of the present invention, a successive approximation method is used to update a reconstructed image in an image update step (step S2), and weighting factors are updated in a weighting factor map update step (step S4), in which a map of weighting factors for prior knowledge is generated from the reconstructed image obtained by updating the image in the image update step (step S2), and the prior knowledge weighting factors for each pixel are adjusted on the basis of the weighting factor map. Thus, a weighting factor map for prior knowledge is generated from the (estimated) reconstructed image obtained by updating the image, and the prior knowledge weighting factors for each pixel are adjusted on the basis of the weighting factor map, thereby making it possible to solve the problem of being unable to obtain high-quality reconstructed images. In other words, adjusting the prior knowledge weighting factors for each pixel makes it possible to avoid imposing excessive restrictions on pixels in reconstructed images, and to obtain high-quality reconstructed images.

Inventors:

CHINOMI KENTA (JP)

Application Number:

PCT/JP2016/057861

Publication Date:

September 14, 2017

Filing Date:

March 11, 2016

Export Citation:

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Assignee:

SHIMADZU CORP (JP)

International Classes:

G01N23/04

Domestic Patent References:

WO2013008702A1

2013-01-17

Foreign References:

JP2006025868A	2006-02-02
JP2005148076A	2005-06-09
JP2011156302A	2011-08-18
JP2014004359A	2014-01-16

Other References: