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公开(公告)号：US10682113B2
公开(公告)日：2020-06-16
申请号：US15461600
申请日：2017-03-17
Applicant: Carestream Health, Inc.
Inventor： Yuan Lin , William J. Sehnert
Abstract: A position sensor has one or more fiducials formed of radio-opaque material and mounted along a surface of a radio-translucent body. A sensor element is coupled to the radio-translucent body and is spaced apart from the one or more fiducials and is energizable to acquire image content during receipt of exposure energy from an X-ray source to the position sensor. The sensor element is in signal communication with a processor and is energizable to generate data that is indicative of a relative position of the X-ray source. A radio-opaque covering is coupled against an outer surface of the radio-translucent body.
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公开(公告)号：US11432789B2
公开(公告)日：2022-09-06
申请号：US17115869
申请日：2020-12-09
Applicant: CARESTREAM HEALTH, INC.
Inventor： William J. Sehnert , Yuan Lin , Levon O. Vogelsang
Abstract: A mobile radiography apparatus includes radiopaque markers disposed in a radiation path that extends from an x-ray source to a digital radiographic detector, which detector is mechanically uncoupled from the x-ray source or x-ray sources. A processing system calculates a position of the detector relative to the x-ray source or x-ray sources according to identified marker positions in acquired x-ray projection images, and reconstructs a volume image according to the acquired x-ray projection images.
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公开(公告)号：US11024061B2
公开(公告)日：2021-06-01
申请号：US16569771
申请日：2019-09-13
Applicant: CARESTREAM HEALTH, INC.
Inventor： Yuan Lin , William J. Sehnert
Abstract: A method for scattered radiation correction acquires radiographic projection image data for a first portion of a subject that lies within a field of view of an imaging apparatus and characterizes the surface contour of the subject that includes at least a second portion of the subject that lies outside the field of view of the imaging apparatus. The surface contour of the subject is characterized according to the reflectance images. The surface contour characterization is registered to the field of view. Scattered radiation is estimated according to the projection image data and the surface contour characterization. The acquired radiographic projection image data is updated according to the estimated scattered radiation. An image of the field of view is displayed according to the conditioned acquired radiographic projection image data.
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公开(公告)号：US10813616B2
公开(公告)日：2020-10-27
申请号：US16106776
申请日：2018-08-21
Applicant: CARESTREAM HEALTH, INC.
Inventor： Yuan Lin , William J. Sehnert
Abstract: A method rotates a radiation source and a detector over a sequence of acquisition angles about a subject and acquires, at each acquisition angle, a 2D projection image. A simulation subset is formed that contains some, but not all, of the acquired 2D projection images, wherein subset membership is determined according to relative signal change between successive 2D projection images. Scatter is characterized for the acquired sequence of projection images according to the formed simulation subset. One or more of the acquired sequence of projection images is corrected using the scatter characterization. An image volume is reconstructed and stored according to the sequence of scatter corrected projection images. One or more images of the reconstructed image volume are rendered to a display or transmitting the stored image volume data.
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公开(公告)号：US10517561B2
公开(公告)日：2019-12-31
申请号：US15971213
申请日：2018-05-04
Applicant: Carestream Health, Inc.
Inventor： Yuan Lin , William J. Sehnert
Abstract: A mobile radiography apparatus has radio-opaque markers, each marker coupled to a portion of an x-ray head of the mobile radiography apparatus, wherein each of the markers is in a radiation path that extends from an x-ray source. A detector is mechanically uncoupled from the x-ray source for positioning behind a patient. Processing logic is configured to calculate detector position with relation to the x-ray source according to identified marker positions in acquired projection images, remove marker indications in the acquired projection images, reconstruct a volume image according to the acquired projection images, and display one or more portions of the reconstructed volume image.
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Patent Agency Ranking
公开(公告)号：US20180113227A1
公开(公告)日：2018-04-26
申请号：US15598634
申请日：2017-05-18
Applicant: CARESTREAM HEALTH, INC.
Inventor： Yuan Lin , William J. Sehnert
Abstract: A method for X-ray spectral calibration acquires X-ray projections of a calibration phantom formed of known materials. The X-ray spectrum of an X-ray source is calculated according to the acquired X-ray projections. The calculated X-ray spectrum can be stored, transmitted, or displayed.
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公开(公告)号：US10552992B2
公开(公告)日：2020-02-04
申请号：US15964835
申请日：2018-04-27
Applicant: CARESTREAM HEALTH, INC.
Inventor： Yuan Lin , William J. Sehnert
Abstract: A method for reducing metal artifacts in a volume radiographic image acquires a first set of projection images of an object on a radiographic detector at different acquisition angles. An initial estimate of the volume that includes the object using the acquired projection images is generated. The estimated volume is updated by one or more iterations of generating a second set of scatter-corrected projection images using the acquired first set of projection images and the estimated volume; generating a third set of estimated projection images using forward ray-tracing through the estimated volume; and reconstructing the estimated volume according to a signal quality factor obtained from analysis of the detector signal and used in a comparison of the second set of scatter-corrected projection images with the third set of estimated projection images. One or more images rendered from the updated estimated volume are displayed.
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公开(公告)号：US10219774B2
公开(公告)日：2019-03-05
申请号：US16009300
申请日：2018-06-15
Applicant: CARESTREAM HEALTH, INC.
Inventor： Yuan Lin , William J. Sehnert , Karin Toepfer
Abstract: A quality control phantom comprises a container and a frame to secure quality control accessories in position within the container during radiologic exposure testing.
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公开(公告)号：US20180070902A1
公开(公告)日：2018-03-15
申请号：US15611900
申请日：2017-06-02
Applicant: Carestream Health, Inc.
Inventor： Yuan Lin , William J. Sehnert
CPC classification number: A61B6/486 , A61B5/0035 , A61B5/0073 , A61B5/0077 , A61B5/1077 , A61B5/1079 , A61B5/7207 , A61B6/03 , A61B6/4085 , A61B6/4417 , A61B6/466 , A61B6/5205 , A61B6/5247 , A61B6/54 , G06T11/006 , G06T17/00
Abstract: A system for reconstructing a 4D image has a surface acquisition system for generating a 3D surface model of an object and an X-ray imaging system for acquiring at least one 2D X-ray projection image of the object. A controller controls the surface acquisition system and the X-ray imaging system. A processor applies a 4D reconstruction algorithm/method to the 3D surface model and the at least one 2D X-ray projection to reconstruct a 4D X-ray volume of the imaged body part in motion.
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公开(公告)号：US20160095569A1
公开(公告)日：2016-04-07
申请号：US14876120
申请日：2015-10-06
Applicant: Carestream Health, Inc.
Inventor： Yuan Lin , William J. Sehnert , Karin Toepfer
IPC: A61B6/00
CPC classification number: A61B6/583 , A61B6/032 , A61B6/4085
Abstract: A quality control phantom comprises a container and a frame to secure quality control accessories in position within the container during radiologic exposure testing.
Abstract translation: 质量控制体模包括容器和框架，以在放射学暴露测试期间将质量控制附件固定在容器内的位置。
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