X-ray CT image reconstruction apparatus, X-ray CT image reconstruction method, and X-ray CT apparatus

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专利权人:

株式会社日立製作所

发明人:

横井 一磨

申请号：

JP2016122391

公开号：

JP6577908B2

申请日:

2016.06.21

申请国别(地区):

JP

年份:

2019

代理人:

摘要：

Base substance thickness projection estimation values (124) and base substance thickness projection estimation error values (125) of M (M≤N) base substances are estimated based on measured count projection values (121) using N energy windows for a subject. The base substance thickness projection estimated values (124) are updated such that a likelihood in accordance with a joint probability density of all of X-ray projection paths based on the base substance thickness projection estimated error values (125) increases. The obtained second base substance thickness projection assumed value (127) is subjected to back projection, thereby obtaining a base substance concentration image estimation value (128).

来源网站：

中国工程科技知识中心

来源网址：

http://www.ckcest.cn/home/