利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

9 条记录 (耗时 0.01 秒)

    METHOD AND APPARATUS FOR EMPIRICAL DETERMINATION OF A CORRECTION FUNCTION FOR CORRECTING BEAM HARDENING AND STRAY BEAM EFFECTS IN PROJECTION RADIOGRAPHY AND COMPUTED TOMOGRAPHY
    2.
    发明申请
    METHOD AND APPARATUS FOR EMPIRICAL DETERMINATION OF A CORRECTION FUNCTION FOR CORRECTING BEAM HARDENING AND STRAY BEAM EFFECTS IN PROJECTION RADIOGRAPHY AND COMPUTED TOMOGRAPHY 审中-公开
    用于校正光束硬化和延迟光束在校正放射学和计算机图像中的校正功能的实验方法和装置

    公开(公告)号：US20110168878A1

    公开(公告)日：2011-07-14

    申请号：US12948718

    申请日：2010-11-17

    申请人： Klaus Hoerndler ,  Christof Fleischmann ,  Marc Kachelriess ,  Ludwig Ritschl

    发明人： Klaus Hoerndler ,  Christof Fleischmann ,  Marc Kachelriess ,  Ludwig Ritschl

    IPC分类号： G01D18/00

    CPC分类号： G06T11/005 ,  A61B6/583

    摘要： Methods for empirical determination of a correction function for correcting beam hardening and stray beam effects of water-equivalent tissue in projection radiography or computed tomography using an imaging detector, and apparatuses for implementing the same are disclosed. The projection values obtained from the logarithmic values of the detector signals are corrected, the corrected projection values being represented by a correction function dependent on the tube voltage applied during the X-ray projection recording, the coefficients of which function are determined from a single calibration scan on an object-like calibration phantom made of water-like material.

    摘要翻译： 公开了用于校正功能的校正功能的校正功能，用于校正投影放射线照相术或使用成像检测器的计算机断层摄影术中的水当量组织的光束硬化和杂散光束效应，以及用于实现其的装置。 从检测器信号的对数值获得的投影值被校正，校正投影值由取决于在X射线投影记录期间施加的管电压的校正函数表示，其函数的系数由单个校准确定 扫描由类似水的材料制成的物体样校准体模。

    Method and system for 4D radiological intervention guidance (4D-cath)
    3.
    发明授权
    Method and system for 4D radiological intervention guidance (4D-cath) 有权

    公开(公告)号：US10918305B2

    公开(公告)日：2021-02-16

    申请号：US13991550

    申请日：2011-12-16

    申请人： Jan Kuntz ,  Soenke Bartling ,  Marc Kachelriess

    发明人： Jan Kuntz ,  Soenke Bartling ,  Marc Kachelriess

    IPC分类号： A61B5/06 ,  G06T11/00 ,  A61B1/267 ,  A61B5/00 ,  A61B5/055 ,  A61B6/03 ,  A61B6/00

    摘要： An imaging method for radiologically guiding an instrument during medical interventions on an object is disclosed. First, a prior volumetric image of the object is provided, followed by periodically providing a current volumetric image on-the-fly during the intervention to an operator by measuring an undersampled set of projections of the object and reconstructing the current image based on changes between the prior volumetric image or an updated prior image and the undersampled set of projections. The method and corresponding system are used for radiologically guiding medical interventions on an object. The system includes a first image provider, an imaging apparatus for measuring undersampled sets of projections, and a processor. The processor communicates with the imaging apparatus for providing updated images on-the-fly during the intervention by reconstructing the updated image based on changes between the first image or an update of the first image and the undersampled sets of projections.

    METHOD, COMPUTING UNIT, CT SYSTEM AND C-ARM SYSTEM FOR REDUCING METAL ARTIFACTS IN CT IMAGE DATASETS
    4.
    发明申请
    METHOD, COMPUTING UNIT, CT SYSTEM AND C-ARM SYSTEM FOR REDUCING METAL ARTIFACTS IN CT IMAGE DATASETS 有权
    方法，计算单元，CT系统和C-ARM系统，用于减少CT图像数据中的金属制品

    公开(公告)号：US20130039556A1

    公开(公告)日：2013-02-14

    申请号：US13562478

    申请日：2012-07-31

    申请人： Marc Kachelriess ,  Esther Meyer ,  Rainer Raupach

    发明人： Marc Kachelriess ,  Esther Meyer ,  Rainer Raupach

    IPC分类号： G06K9/40 ,  G06K9/00

    CPC分类号： A61B6/00 ,  A61B6/03 ,  A61B6/5282 ,  G06T5/003 ,  G06T5/50 ,  G06T11/008 ,  G06T2207/10081

    摘要： A method is disclosed for reducing metal artifacts in CT image datasets. An embodiment of the method includes reconstructing a first CT image dataset with and a second CT image dataset without metal artifact correction, weighted summation of a high-pass-filtered first and a high-pass-filtered second CT image dataset plus a low-pass-filtered second CT image dataset, wherein the weightings are dependent on the proximity to metal in the CT image datasets. A computing unit, a CT system and a C-arm system designed to execute the method are also disclosed.

    摘要翻译： 公开了一种用于减少CT图像数据集中的金属伪影的方法。 该方法的实施例包括用没有金属伪像校正的第一CT图像数据集和第二CT图像数据集重建第一CT图像数据集，高通滤波的第一和高通滤波的第二CT图像数据集加低通的加权求和 过滤的第二CT图像数据集，其中权重取决于CT图像数据集中金属的接近度。 还公开了一种计算单元，CT系统和设计用于执行该方法的C臂系统。

    Method and apparatus for spiral scan computed tomography
    6.
    发明授权
    Method and apparatus for spiral scan computed tomography 有权
    螺旋扫描计算机断层扫描的方法和装置

    公开(公告)号：US07215805B2

    公开(公告)日：2007-05-08

    申请号：US10074145

    申请日：2002-02-12

    申请人： Herbert Bruder ,  Thomas Flohr ,  Marc Kachelriess ,  Stefan Schaller ,  Karl Stierstorfer

    发明人： Herbert Bruder ,  Thomas Flohr ,  Marc Kachelriess ,  Stefan Schaller ,  Karl Stierstorfer

    IPC分类号： G06K9/00

    CPC分类号： A61B6/032 ,  A61B6/027 ,  A61B6/4085 ,  Y10S378/901

    摘要： In a method for computed tomography and a computed tomography apparatus for scanning a subject with a conical ray beam emanating from a focus that detects a matrix-like detector array, the focus is moved relative to the subject on a spiral path around a system axis, and the detector array supplies output data corresponding to the incident radiation, and images having an inclined image plane are reconstructed from output data respectively supplied during the movement of the focus on a spiral segment, the image planes of these images are inclined by an inclination angle γ around a first axis intersecting the system axis at a right angle and also are inclined by a tilt angle δ with respect to the system axis around a second axis that intersects the first axis as well as the system axis at a right angle.

    摘要翻译： 在用于计算机断层摄影的方法和用于使用从检测矩阵状检测器阵列的焦点发出的锥形射线束扫描对象的计算机断层摄影装置中，聚焦在围绕系统轴线的螺旋路径上相对于被摄体移动， 并且检测器阵列提供对应于入射辐射的输出数据，并且具有倾斜图像平面的图像从在焦点移动到螺旋段时分别提供的输出数据重建，这些图像的图像平面倾斜倾斜角 围绕与系统轴线成直角相交的第一轴线的伽马，并且相对于围绕与第一轴线相交的第二轴线的系统轴线以及直角的系统轴线倾斜倾斜角度。

    Method, computing unit, CT system and C-arm system for reducing metal artifacts in CT image datasets
    7.
    发明授权
    Method, computing unit, CT system and C-arm system for reducing metal artifacts in CT image datasets 有权
    方法，计算单元，CT系统和C臂系统，用于减少CT图像数据集中的金属伪影

    公开(公告)号：US08891885B2

    公开(公告)日：2014-11-18

    申请号：US13562478

    申请日：2012-07-31

    申请人： Marc Kachelriess ,  Esther Meyer ,  Rainer Raupach

    发明人： Marc Kachelriess ,  Esther Meyer ,  Rainer Raupach

    IPC分类号： G06K9/00 ,  A61B6/03 ,  G06T5/50 ,  A61B6/00 ,  G06T11/00 ,  G06T5/00

    CPC分类号： A61B6/00 ,  A61B6/03 ,  A61B6/5282 ,  G06T5/003 ,  G06T5/50 ,  G06T11/008 ,  G06T2207/10081

    摘要： A method is disclosed for reducing metal artifacts in CT image datasets. An embodiment of the method includes reconstructing a first CT image dataset with and a second CT image dataset without metal artifact correction, weighted summation of a high-pass-filtered first and a high-pass-filtered second CT image dataset plus a low-pass-filtered second CT image dataset, wherein the weightings are dependent on the proximity to metal in the CT image datasets. A computing unit, a CT system and a C-arm system designed to execute the method are also disclosed.

    摘要翻译： 公开了用于减少CT图像数据集中的金属伪影的方法。 该方法的实施例包括用没有金属伪像校正的第一CT图像数据集和第二CT图像数据集重建第一CT图像数据集，高通滤波的第一和高通滤波的第二CT图像数据集加低通的加权求和 过滤的第二CT图像数据集，其中权重取决于CT图像数据集中金属的接近度。 还公开了一种计算单元，CT系统和设计用于执行该方法的C臂系统。

    Method and System for 4D Radiological Intervention Guidance (4D-cath)
    8.
    发明申请
    Method and System for 4D Radiological Intervention Guidance (4D-cath) 审中-公开
    4D放射干预指导方法与系统（4D-cath）

    公开(公告)号：US20130303884A1

    公开(公告)日：2013-11-14

    申请号：US13991550

    申请日：2011-12-16

    申请人： Jan Kuntz ,  Soenke Bartling ,  Marc Kachelriess

    发明人： Jan Kuntz ,  Soenke Bartling ,  Marc Kachelriess

    IPC分类号： A61B5/06 ,  A61B1/267 ,  A61B5/00 ,  A61B6/00 ,  A61B5/055 ,  A61B6/03

    CPC分类号： A61B5/062 ,  A61B1/2676 ,  A61B5/0042 ,  A61B5/0044 ,  A61B5/055 ,  A61B6/032 ,  A61B6/405 ,  A61B6/501 ,  A61B6/503 ,  A61B6/542 ,  G06T11/006 ,  G06T2211/412 ,  G06T2211/428 ,  G06T2211/436

    摘要： An imaging method for radiologically guiding an instrument during medical interventions on an object comprising: providing a first image of said object followed by providing updated images on-the-fly during the intervention to an operator by measuring an undersampled set of projections of said object and reconstructing said updated image based on changes between said first image or an update of said first image and said undersampled set of projections. The invention further relates to particular uses of the method and a system for radiologically guiding medical interventions on an object, comprising means to provide a first image of the object; an imaging apparatus measuring undersampled sets of projections; processing means in communication with the imaging apparatus for providing updated images on-the-fly during the intervention by reconstructing said updated image based on changes between said first image or an update of said first image and said undersampled set of projections.

    摘要翻译： 一种用于在对物体进行医疗干预期间放射线地引导器械的成像方法，包括：提供所述物体的第一图像，然后通过测量所述物体的欠采样的投影集，在介入期间向操作者提供更新的图像， 基于所述第一图像或所述第一图像和所述欠采样的投影集的更新之间的变化重建所述更新的图像。 本发明还涉及该方法的特定用途和用于在物体上放射学地指导医疗干预的系统，包括提供物体的第一图像的装置; 测量欠采样的投影组的成像装置; 与成像设备通信的处理装置，用于在介入期间通过基于所述第一图像或所述第一图像的更新与所述欠采样的投影集之间的变化重建所述更新的图像来在所述干预期间随时提供更新的图像。

    SYSTEMS AND METHODS FOR ADAPTIVE FILTERING
    9.
    发明申请
    SYSTEMS AND METHODS FOR ADAPTIVE FILTERING 有权
    用于自适应滤波的系统和方法

    公开(公告)号：US20100054562A1

    公开(公告)日：2010-03-04

    申请号：US12201390

    申请日：2008-08-29

    申请人： Timo Berkus ,  Patrik Kunz ,  Markus Oelhafen ,  Marc Kachelriess

    发明人： Timo Berkus ,  Patrik Kunz ,  Markus Oelhafen ,  Marc Kachelriess

    IPC分类号： G06K9/40 ,  G06K9/00

    CPC分类号： G06T11/005 ,  G06T5/002 ,  G06T2207/10081 ,  G06T2207/20012 ,  G06T2207/20221

    摘要： A system for obtaining an image includes a processor for receiving a projection image, processing the projection image to obtain a filtered image, applying a first factor for the projection image to obtain a first weighted image, applying a second factor for the filtered image to obtain a second weighted image, and obtaining a corrected image using the first and second weighted images, and a medium for storing the corrected image. A method of processing an image includes receiving a projection image, processing the projection image to obtain a filtered image, and determining a corrected image by applying a first factor for the projection image and applying a second factor for the filtered image. A method for obtaining an image includes determining a factor, using the factor to control a radiation source, and using the factor to reduce noise in an image generated using the radiation source.

    摘要翻译： 一种用于获得图像的系统包括：处理器，用于接收投影图像，处理投影图像以获得滤波图像，应用投影图像的第一因子以获得第一加权图像;对滤波图像应用第二因子以获得 第二加权图像，以及使用第一和第二加权图像获得校正图像，以及用于存储校正图像的介质。 处理图像的方法包括接收投影图像，处理投影图像以获得滤波图像，以及通过对投影图像应用第一因子并对滤波图像应用第二因子来确定校正图像。 用于获得图像的方法包括使用控制辐射源的系数确定因子，并且使用该因子来减少使用该辐射源产生的图像中的噪声。