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1.发明公开
公开(公告)号：EP4173568A1
公开(公告)日：2023-05-03
申请号：EP22201479.7
申请日：2022-10-13
发明人： FAN, Jiahua , YAN, Ming , PACK, Jed Douglas , MADHAV, Priti , OGATA, Kentaro , ARAI, Ken
IPC分类号： A61B6/02 , A61B6/00 , G01N23/087 , G06T11/00 , A61B6/03
摘要： A method includes acquiring a first dataset of projection measurements at a first energy spectrum and a second dataset of projection measurements at a second energy spectrum different from the first energy spectrum by switching between acquiring the first dataset for a set number of consecutive views at different projection angles at the first energy spectrum and acquiring the second dataset for the set number of consecutive views at different projection angles at the second energy spectrum. The set number of consecutive views is greater than one. The method includes supplementing both the first dataset with estimated projection measurements at the first energy spectrum and the second dataset with estimated projection measurements at the second energy spectrum to provide missing projection measurements at different projection angles not acquired during the imaging scan for the first dataset and the second dataset.
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公开(公告)号：EP4413928A1
公开(公告)日：2024-08-14
申请号：EP24151592.3
申请日：2024-01-12
发明人： DAS, Bipul , AGRAWAL, Utkarsh , SUDHAKARA MURTHY, Prasad , SHIGEMASA, Risa , OGATA, Kentaro , IMAI, Yasuhiro
CPC分类号： G06T11/006 , G06T11/005 , A61B6/5205 , A61B6/032 , A61B6/482
摘要： Methods and systems are provided for interpolating missing views in dual-energy computed tomography data. In one example, a method includes obtaining (302, 304) a first sinogram missing a plurality of views and a second sinogram missing a different plurality of views, the first sinogram acquired with a first X-ray source energy during a scan and the second sinogram acquired with a second, different X-ray source energy during the scan; initializing (306) each of the first sinogram and the second sinogram to form a first initialized sinogram and a second initialized sinogram; entering (312) the first initialized sinogram and the second initialized sinogram into the same or different interpolation models trained to output a first filled sinogram based on the first initialized sinogram and output a second filled sinogram based on the second initialized sinogram; and reconstructing (318) one or more images from the first filled sinogram and the second filled sinogram.
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公开(公告)号：EP4285830A1
公开(公告)日：2023-12-06
申请号：EP23174524.1
申请日：2023-05-22
发明人： OGATA, Kentaro
摘要： PROBLEM
To provide technology capable of positioning an imaging location at a desired position.
[Resolution means]
A CT device 100, comprising:
a table 116 on which a subject body 112 is placed; and
at least one processor; wherein
when executing an examination on the subject body 112, the at least one processor executes operations including:
driving the table 116 using a table controller 118 that controls the table 116 based on offsets (F1, F2, F3) for correcting positional offset of the table 116 height to position the table 116 at an isocenter 31,
obtaining a center of gravity 32 of the imaging location of the subject body in the height direction of the table 116 based on a scout image 17 of the imaging location of the subject body 112,
calculating a difference of the isocenter 31 and the center of gravity 32 as a positional deviation d of the table 116 height, and
storing the positional deviation d, and
the at least one processor further executes operations including:
obtaining an average value dave of the positional deviation d,
determining whether or not the average value dave of the table 116 positional deviation d is statistically reliable, and
updating the offsets based on the average value dave if the average value dave is determined to be statistically reliable.
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