公开(公告)号：US10213179B2

公开(公告)日：2019-02-26

申请号：US15415805

申请日：2017-01-25

Applicant: Samsung Electronics Co., Ltd

Inventor： Jong-hyon Yi ,  Toshihiro Rifu ,  Ajay Narayanan ,  Alexander Zamyatin ,  Seok-min Han

IPC: G06K9/00 ,  A61B6/00 ,  G06T11/00 ,  A61B6/03 ,  A61B5/00

Abstract: Provided are a tomography apparatus and a method for reconstructing a tomography image. The method includes obtaining a plurality of raw data corresponding to a plurality of views by performing a tomography scan on an object and deblurring each of the plurality of raw data based on a point spread function (PSF) that varies according to locations in a field of view (FOV) in a gantry. The method also includes reconstructing a final tomography image in which a motion of the object is corrected from the plurality of deblurred raw data based on a motion vector indicating the motion of the object.

公开(公告)号：US10013778B2

公开(公告)日：2018-07-03

申请号：US15084709

申请日：2016-03-30

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Sang-wook Yoo ,  Ajay Narayanan ,  Toshihiro Rifu ,  Gun-woo Lee ,  Jong-hyon Yi

IPC: G06T11/00 ,  G06T7/00 ,  G06T7/20 ,  G06T5/00

CPC classification number: G06T11/006 ,  G06T5/003 ,  G06T11/005 ,  G06T2207/10081 ,  G06T2207/20201 ,  G06T2211/412

Abstract: A tomography apparatus includes a data acquirer configured to obtain a first partial image and a second partial image of an object based on data that is obtained respectively at a first angular section corresponding to a first time and at a second angular section corresponding to a second time during a tomography scan of the object that is moving, a controller configured to determine first information indicating a motion amount of the object in a first area of an entire image based on the first partial image and the second partial image, and determine second information indicating a degree of blur of a point included in the object in the first area based on the first information, and an image processor configured to correct the first area based on the first information and the second information, and output a tomography image based on the corrected first area.

公开(公告)号：US20170209112A1

公开(公告)日：2017-07-27

申请号：US15415805

申请日：2017-01-25

Applicant: Samsung Electronics Co., Ltd

Inventor： Jong-hyon Yi ,  Toshihiro Rifu ,  Ajay Narayanan ,  Alexander Zamyatin ,  Seok-min Han

IPC: A61B6/00 ,  G06T5/00 ,  G06T11/00 ,  A61B5/00 ,  G06T7/60 ,  G06T15/08 ,  G06T7/73 ,  A61B6/03 ,  G06T7/00 ,  G06T7/20

CPC classification number: A61B6/5264 ,  A61B5/0066 ,  A61B5/721 ,  A61B6/032 ,  A61B6/037 ,  A61B6/5205 ,  A61B6/5258 ,  G06T11/005 ,  G06T2211/412

Abstract: Provided are a tomography apparatus and a method for reconstructing a tomography image. The method includes obtaining a plurality of raw data corresponding to a plurality of views by performing a tomography scan on an object and deblurring each of the plurality of raw data based on a point spread function (PSF) that varies according to locations in a field of view (FOV) in a gantry. The method also includes reconstructing a final tomography image in which a motion of the object is corrected from the plurality of deblurred raw data based on a motion vector indicating the motion of the object.

公开(公告)号：US20160345926A1

公开(公告)日：2016-12-01

申请号：US14964339

申请日：2015-12-09

Applicant: Samsung Electronics, Co. Ltd.

Inventor： Sandeep Dutta ,  Ajay Narayanan

IPC: A61B6/00 ,  A61B6/03

CPC classification number: A61B6/5264 ,  A61B6/032 ,  A61B6/486 ,  A61B6/503 ,  A61B6/541

Abstract: Embodiments are adapted for acquiring projection data from a computed tomography imaging system to form motion-corrected images of cyclically moving imaging subjects. Embodiments determine a start time and time duration of a data record with sufficient data for forming a motion-corrected image from the data record, without screening data records or images for motion artifacts. Some embodiments acquire data asynchronously with respect to the cyclical motion of the imaging subject, without using a signal such as an EKG to select a period of low subject motion for imaging. Other embodiments use a pulse signal synchronized to the imaging subject's motions to reduce an amount of data presented for image reconstruction, or to target a specific phase of the imaging subject's cyclical motion.

Abstract translation: 实施例适于从计算机断层摄影成像系统获取投影数据，以形成循环移动成像对象的运动校正图像。 实施例确定具有足够数据的数据记录的开始时间和持续时间，用于从数据记录形成运动校正图像，而无需屏蔽运动伪像的数据记录或图像。 一些实施例相对于成像对象的循环运动异步地获取数据，而不使用诸如EKG的信号来选择用于成像的低对象运动的周期。 其他实施例使用与成像对象的运动同步的脉冲信号来减少呈现用于图像重建的数据量，或者针对成像对象的循环运动的特定阶段。