Invention Grant
- Patent Title: X-ray CT image reconstruction device, X-ray CT image reconstruction method, and X-ray CT apparatus
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Application No.: US16099492Application Date: 2017-06-02
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Publication No.: US10363002B2Publication Date: 2019-07-30
- Inventor: Kazuma Yokoi
- Applicant: HITACHI, LTD.
- Applicant Address: JP Tokyo
- Assignee: Hitachi, Ltd.
- Current Assignee: Hitachi, Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Mattingly & Malur, PC
- Priority: JP2016-122391 20160621
- International Application: PCT/JP2017/020708 WO 20170602
- International Announcement: WO2017/221673 WO 20171228
- Main IPC: G06K9/00
- IPC: G06K9/00 ; A61B6/03 ; G06T11/00 ; A61B6/00
Abstract:
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).
Public/Granted literature
- US20190105002A1 X-RAY CT IMAGE RECONSTRUCTION DEVICE, X-RAY CT IMAGE RECONSTRUCTION METHOD, AND X-RAY CT APPARATUS Public/Granted day:2019-04-11
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