METHOD AND SYSTEM FOR ESTIMATING CT IMAGE NOISE MAP

Title:

METHOD AND SYSTEM FOR ESTIMATING CT IMAGE NOISE MAP

Document Type and Number:

WIPO Patent Application WO/2014/119639

Kind Code:

A1

Abstract:

The objective of the present invention is to remove or relax restrictions when estimating a CT image noise map. A method for estimating a noise map from a reconstruction image groups a first number of views into first and second groups. The first and second groups comprise a second number of views and a third number of views respectively. Either the second number or the third number is smaller than the first number. Two reconstruction images are reconstructed from projection data of views included in the two groups. Variance is estimated on the basis of the two reconstruction images and weighting.

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Inventors:

SHI DAXIN (US)

Application Number:

PCT/JP2014/052036

Publication Date:

August 07, 2014

Filing Date:

January 30, 2014

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Assignee:

TOSHIBA KK (JP)
TOSHIBA MEDICAL SYS CORP (JP)

International Classes:

A61B6/03

Domestic Patent References:

WO2012173205A1	2012-12-20
WO2011064683A2	2011-06-03

Foreign References:

JP2012250043A	2012-12-20
JP2006116137A	2006-05-11

Attorney, Agent or Firm:

KURATA, Masatoshi et al. (JP)
Masatoshi Kurata (JP)

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