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公开(公告)号：US20170365076A1
公开(公告)日：2017-12-21
申请号：US15187834
申请日：2016-06-21
Applicant: Carestream Health, Inc.
Inventor： Lawrence A. Ray , Richard A. Simon , Levon O. Vogelsang
CPC classification number: G06T11/008 , G06T5/002 , G06T2207/10081
Abstract: A method of generating a synthesized digital projection image, executed at least in part by a computer, acquires x-ray projection images at corresponding acquisition angles, and reconstructs a first volume image. Forward projection generates a preceding forward projection image at a first acquisition angle; a following forward projection image at an adjacent second acquisition angle; and an intermediate forward projection image for an intermediate angle. A synthesized projection image is formed by identifying a candidate patch of pixels from the intermediate forward projection image, matching a first patch of pixels from the preceding forward projection image and identifying a corresponding first acquired patch of pixels from the first acquired x-ray projection image, matching a second patch of pixels from the following forward projection image and matching a second acquired patch of pixels from the forward projection image. The first and second acquired patches are combined.
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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：US10089758B1
公开(公告)日：2018-10-02
申请号：US15472613
申请日：2017-03-29
Applicant: Carestream Health, Inc.
Inventor： Lawrence A. Ray , Richard A. Simon , Levon O. Vogelsang
Abstract: A method for forming an image reconstructs a volume image according to X-ray projection images acquired at acquisition angles. The full volume image is partitioned to form at least a first and a second non-overlapping sub-volume. Within each sub-volume, forward projection images for the sub-volume are calculated, with the corresponding forward projection images computed at the acquisition angles, and with intermediate forward projection images at angles between the acquisition angles. A weight factor relates the contribution of each pixel in the X-ray projection images to each sub-volume at each acquisition angle. Synthesized sub-volume projection images are formed according to the calculated weight factors and acquired projection images in each sub-volume. Synthesized sub-volume projection images form synthesized projection images for the full volume image. A second volume image is reconstructed according to the acquired X-ray projection images and the synthesized projection images. The reconstructed second volume image is displayed, stored, or transmitted.
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公开(公告)号：US09965875B2
公开(公告)日：2018-05-08
申请号：US15187834
申请日：2016-06-21
Applicant: Carestream Health, Inc.
Inventor： Lawrence A. Ray , Richard A. Simon , Levon O. Vogelsang
CPC classification number: G06T11/008 , G06T5/002 , G06T2207/10081
Abstract: A method of generating a synthesized digital projection image, executed at least in part by a computer, acquires x-ray projection images at corresponding acquisition angles, and reconstructs a first volume image. Forward projection generates a preceding forward projection image at a first acquisition angle; a following forward projection image at an adjacent second acquisition angle; and an intermediate forward projection image for an intermediate angle. A synthesized projection image is formed by identifying a candidate patch of pixels from the intermediate forward projection image, matching a first patch of pixels from the preceding forward projection image and identifying a corresponding first acquired patch of pixels from the first acquired x-ray projection image, matching a second patch of pixels from the following forward projection image and matching a second acquired patch of pixels from the forward projection image. The first and second acquired patches are combined.
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公开(公告)号：US10722207B2
公开(公告)日：2020-07-28
申请号：US16372477
申请日：2019-04-02
Applicant: CARESTREAM HEALTH, INC.
Inventor： Levon O. Vogelsang , Richard A. Simon , Lawrence A. Ray
Abstract: A method for geometric calibration of a radiography apparatus acquires tomosynthesis projection images of patient anatomy from a detector and an x-ray source translated along a scan path. An epipolar geometry is calculated according to the relative position of the detector to the scan path by estimating a direction for epipolar lines that extend along an image plane that includes the detector. A region of interest of the patient anatomy that is a portion of each projection image and is fully included within each projection image in the series is defined. A consistency metric is calculated for estimated epipolar lines extending within the ROI. The method iteratively adjusts the epipolar line estimation until the consistency metric indicates accuracy to within a predetermined threshold. A portion of a tomosynthesis volume is reconstructed and displayed.
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Patent Agency Ranking
公开(公告)号：US10307114B1
公开(公告)日：2019-06-04
申请号：US15974812
申请日：2018-05-09
Applicant: CARESTREAM HEALTH, INC.
Inventor： Lawrence A. Ray , Richard A. Simon , Levon O. Vogelsang
Abstract: A method for imaging a subject obtains a first set of acquired projection images of a subject volume, wherein each projection image in the first set has a corresponding acquisition angle and forms an initial reconstructed volume image. A second set of synthetic projection images is generated according to processing of the acquired projection images and combined with the first set to form a combined set of projection images. The method augments the initial reconstructed image to form an improved reconstructed image by at least a first iteration of an iterative reconstruction process using the initial reconstructed image with the combined set of acquired and synthetic projection images and at least a subsequent iteration of the iterative reconstruction process using the first set of acquired projection images and fewer than, or none of, the second set of synthetic projection images. The improved reconstruction image is rendered on a display.
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公开(公告)号：US20180286087A1
公开(公告)日：2018-10-04
申请号：US15472613
申请日：2017-03-29
Applicant: Carestream Health, Inc.
Inventor： Lawrence A. Ray , Richard A. Simon , Levon O. Vogelsang
Abstract: A method for forming an image reconstructs a volume image according to X-ray projection images acquired at acquisition angles. The full volume image is partitioned to form at least a first and a second non-overlapping sub-volume. Within each sub-volume, forward projection images for the sub-volume are calculated, with the corresponding forward projection images computed at the acquisition angles, and with intermediate forward projection images at angles between the acquisition angles. A weight factor relates the contribution of each pixel in the X-ray projection images to each sub-volume at each acquisition angle. Synthesized sub-volume projection images are formed according to the calculated weight factors and acquired projection images in each sub-volume. Synthesized sub-volume projection images form synthesized projection images for the full volume image. A second volume image is reconstructed according to the acquired X-ray projection images and the synthesized projection images. The reconstructed second volume image is displayed, stored, or transmitted.
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公开(公告)号：US11478213B2
公开(公告)日：2022-10-25
申请号：US17152389
申请日：2021-01-19
Applicant: CARESTREAM HEALTH, INC.
Inventor： Xiaohui Wang , William J. Sehnert , Levon O. Vogelsang , David H. Foos , Yuan Lin
Abstract: A mobile radiography apparatus is configured to sparsely sample radiographic projection images to generate high resolution tomosynthesis volume images using a digital radiographic detector that is mechanically uncoupled from the x-ray source and an artificial intelligence network. The artificial intelligence network is trained to correct a volume image generated from sparsely sample projection images to generate the high resolution tomosynthesis volume images.
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公开(公告)号：US10789737B2
公开(公告)日：2020-09-29
申请号：US15780400
申请日：2016-12-20
Applicant: CARESTREAM HEALTH, INC.
Inventor： Xiaohui Wang , Richard A. Simon , Levon O. Vogelsang , Nathan J. Packard
Abstract: A computer implemented method for reconstructing a 3-D volume image using a radiographic imaging system having one or more x-ray sources and a digital detector. A plurality of radiographic images of a subject at various angles are captured in the digital detector. Image data in two or more pixels of the detector that are adjacent to each other in a row direction or a column direction are combined, while pixels adjacent in the other direction are not combined.
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公开(公告)号：US20190038238A1
公开(公告)日：2019-02-07
申请号：US15670292
申请日：2017-08-07
Applicant: Carestream Health, Inc.
Inventor： Lawrence A. Ray , Richard A. Simon , Levon O. Vogelsang
Abstract: An imaging method, accesses a set of low-energy projection images and performs a low-energy reconstruction using the low-energy projection images. A synthesized intermediate low-energy projection image is generated. A high-energy reconstruction is performed using a set of high-energy projection images. A synthesized intermediate high-energy projection image is generated. A dual-energy reconstruction is performed using at least one low-energy projection image, the synthesized intermediate low-energy projection image, at least one high-energy projection image, and the synthesized intermediate high-energy projection image.
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