公开(公告)号：US11756242B2

公开(公告)日：2023-09-12

申请号：US17493208

申请日：2021-10-04

申请人： Medtronic Navigation, Inc. ,  The Johns Hopkins University

发明人： Patrick A. Helm ,  Jeffrey H. Siewerdsen ,  Ali Uneri ,  Wojciech Zbijewski ,  Xiaoxuan Zhang ,  Joseph W. Stayman, IV

IPC分类号： G06T11/00 ,  G06T5/00 ,  G06T7/60 ,  A61B6/00 ,  A61B34/10 ,  A61B90/00

CPC分类号： G06T11/006 ,  A61B6/5282 ,  A61B34/10 ,  A61B90/37 ,  G06T5/002 ,  G06T5/005 ,  G06T7/60 ,  A61B2034/102 ,  A61B2090/376 ,  A61B2090/3764 ,  G06T2207/10124 ,  G06T2207/20081 ,  G06T2207/20182 ,  G06T2207/20221 ,  G06T2207/30052

摘要： Selected artifacts, which may be based on distortions or selected attenuation features, may be reduced or removed from a reconstructed image. Various artifacts may occur due to the presence of a metal object in a field of view. The metal object may be identified and removed from a data that is used to generate a reconstruction.

公开(公告)号：US12039738B2

公开(公告)日：2024-07-16

申请号：US17056639

申请日：2019-05-17

申请人： THE JOHNS HOPKINS UNIVERSITY

发明人： Jeffrey H. Siewerdsen ,  Wojciech Zbijewski ,  Alejandro Sisniega ,  Joseph Webster Stayman

IPC分类号： G06T7/20 ,  A61B6/00 ,  A61B6/03 ,  A61B6/40 ,  A61B6/50

CPC分类号： G06T7/20 ,  A61B6/032 ,  A61B6/4021 ,  A61B6/4085 ,  A61B6/501 ,  A61B6/5205 ,  A61B6/5264 ,  G06T2207/10081 ,  G06T2207/20201

摘要： The present invention is directed to a method of multi-motion compensation for high-quality cone-beam CT of the head. A multi-stage approach is incorporated that includes a pre-conditioning stage in which an initial estimation of the motion trajectory is obtained with 3D-2D registration using the motion-contaminated CBCT and projection data. In the present invention, the motion-contaminated CBCT is used as a basis for 3D-2D registration in the pre-conditioning stage to capture large amplitude, rapid movements of the head and provide better initialization of the autofocus solution.

公开(公告)号：US20160262709A1

公开(公告)日：2016-09-15

申请号：US15030818

申请日：2014-11-25

申请人： THE JOHNS HOPKINS UNIVERSITY ,  CARESTREAM HEALTH, INC.

发明人： Jeffrey H. Siewerdsen ,  J. Webster Stayman ,  Wojciech Zbijewski ,  John Yorkston

IPC分类号： A61B6/00 ,  A61B6/03

CPC分类号： A61B6/4007 ,  A61B6/032 ,  A61B6/4035 ,  A61B6/4085 ,  A61B6/482 ,  A61B6/505 ,  A61B6/5205 ,  A61B6/5235 ,  A61B6/5241 ,  A61B6/5258 ,  A61B6/54

摘要： The present invention is directed to a system and method for dual-energy (DE) or multiple-energy (spectral) cone-beam computed tomography (CBCT) using a configuration of multiple x-ray sources and a single detector. The x-ray sources are operated to produce x-ray spectra of different energies (peak kilovoltage (kVp) and/or filtration). Volumetric 3D image reconstruction and dual or triple energy 3D image decomposition can be executed using data from the CBCT scan. The invention allows for a variety of selections in energy and filtration associated with each source and the order of pulsing for each source (“firing pattern”). The motivation for distributing the sources along the z direction in CBCT includes extension of the longitudinal field of view and reduction of cone-beam artifacts.

摘要翻译： 本发明涉及使用多个X射线源和单个检测器的配置的双能量（DE）或多能量（频谱）锥束计算机断层摄影（CBCT）的系统和方法。 操作x射线源以产生不同能量（峰值千伏（kVp）和/或过滤）的x射线光谱。 体积3D图像重建和双重或三重能量3D图像分解可以使用CBCT扫描的数据执行。 本发明允许与每个源相关联的能量和过滤中的各种选择以及针对每个源（“点火模式”）的脉冲顺序。 在CBCT中沿Z方向分配源的动机包括纵向视场的扩展和锥束伪影的减少。