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1. 发明授权

US08923590B2 Method and system for 3D cardiac motion estimation from single scan of C-arm angiography 有权
标题翻译： C型血管造影单次扫描三维心脏运动估计方法与系统
公开(公告)号：US08923590B2
公开(公告)日：2014-12-30
申请号：US13346818
申请日：2012-01-10
申请人： Mingqing Chen , Yefeng Zheng , Gareth Funka-Lea , Guenter Lauritsch , Jan Boese , Dorin Comaniciu
发明人： Mingqing Chen , Yefeng Zheng , Gareth Funka-Lea , Guenter Lauritsch , Jan Boese , Dorin Comaniciu
IPC分类号： G06K9/00 , G06T7/00
CPC分类号： G06T7/0083 , G06T7/12 , G06T7/149 , G06T2207/10081 , G06T2207/30048
摘要： A method and system for estimating 3D cardiac motion from a single C-arm angiography scan is disclosed. An initial 3D volume is reconstructed from a plurality of 2D projection images acquired in a single C-arm scan. A static mesh is extracted by segmenting an object in the initial 3D volume. The static mesh is projected to each of the 2D projection images. A cardiac phase is determined for each of the 2D projection images. A deformed mesh is generated for each of a plurality of cardiac phases based on a 2D contour of the object and the projected mesh in each of the 2D projection images of that cardiac phase.
摘要翻译：公开了一种用于从单个C臂血管造影扫描估计3D心脏运动的方法和系统。从在单个C臂扫描中获取的多个2D投影图像重建初始3D体积。通过在初始3D体积中分割对象来提取静态网格。将静态网格投影到每个2D投影图像。为每个2D投影图像确定心脏相位。基于对象的2D轮廓和该心脏相的每个2D投影图像中的投影网格，为多个心脏相位中的每一个产生变形的网格。

2. 发明申请

US20080247503A1 MEASURING BLOOD VOLUME WITH C-ARM COMPUTED TOMOGRAPHY 有权
标题翻译：用C-ARM计算机血压测量血液量
公开(公告)号：US20080247503A1
公开(公告)日：2008-10-09
申请号：US12061357
申请日：2008-04-02
申请人： Guenter Lauritsch , Thomas Redel , Michael Zellerhoff
发明人： Guenter Lauritsch , Thomas Redel , Michael Zellerhoff
IPC分类号： A61B6/03
CPC分类号： A61B6/504 , A61B6/032 , A61B6/4441 , A61B6/481 , A61B6/507
摘要： A system and method of obtaining perfusion data for cerebral tissue is described. The system includes a C-arm X-ray device and a computing system configured to obtain sets of rotational projection X-ray data suitable for reconstructing 3D voxel data sets. A first data set is obtained of the patient, and then contrast material is injected into the vascular system to obtain a second 1 data set. A first voxel data set is subtracted from the second voxel data set, and the resultant data set is processed so as to segment the contrast-enhanced vasculature from the remaining data. The segmented voxels are subtracted from the resultant voxel data set, so as to yield a functional data set representing the difference between the attenuation of the tissues after administering contrast agent and the tissues prior to administering the contrast agent, without the contrast enhanced vasculature. The attenuation of the functional data set represents the perfusion or cerebral blood volume (CBV).
摘要翻译：描述了获得脑组织灌注数据的系统和方法。该系统包括C臂X射线装置和被配置为获得适于重建3D体元数据集的旋转投影X射线数据的组的计算系统。获得患者的第一数据集，然后将造影材料注入血管系统以获得第二个1数据集。从第二体素数据集中减去第一体素数据集，并且处理结果数据集，以便从剩余数据中分割对比度增强的脉管系统。从所得到的体元数据集中减去分割体素，从而产生表示施用造影剂之前的组织的衰减与施用造影剂之前的组织之间的差异的功能数据集，而没有对比度增强的脉管系统。功能数据集的衰减表示灌注或脑血容量（CBV）。

3. 发明申请

US20120189185A1 Method and System for 3D Cardiac Motion Estimation from Single Scan of C-Arm Angiography 有权
标题翻译： C型血管造影单次扫描三维心脏运动估计方法与系统
公开(公告)号：US20120189185A1
公开(公告)日：2012-07-26
申请号：US13346818
申请日：2012-01-10
申请人： Mingqing Chen , Yefeng Zheng , Gareth Funka-Lea , Guenter Lauritsch , Jan Boese , Dorin Comaniciu
发明人： Mingqing Chen , Yefeng Zheng , Gareth Funka-Lea , Guenter Lauritsch , Jan Boese , Dorin Comaniciu
IPC分类号： G06T5/00
CPC分类号： G06T7/0083 , G06T7/12 , G06T7/149 , G06T2207/10081 , G06T2207/30048
摘要： A method and system for estimating 3D cardiac motion from a single C-arm angiography scan is disclosed. An initial 3D volume is reconstructed from a plurality of 2D projection images acquired in a single C-arm scan. A static mesh is extracted by segmenting an object in the initial 3D volume. The static mesh is projected to each of the 2D projection images. A cardiac phase is determined for each of the 2D projection images. A deformed mesh is generated for each of a plurality of cardiac phases based on a 2D contour of the object and the projected mesh in each of the 2D projection images of that cardiac phase.
摘要翻译：公开了一种用于从单个C臂血管造影扫描估计3D心脏运动的方法和系统。从在单个C臂扫描中获取的多个2D投影图像重建初始3D体积。通过在初始3D体积中分割对象来提取静态网格。将静态网格投影到每个2D投影图像。为每个2D投影图像确定心脏相位。基于对象的2D轮廓和该心脏相的每个2D投影图像中的投影网格，为多个心脏相位中的每一个产生变形的网格。

4. 发明授权

US06442288B1 Method for reconstructing a three-dimensional image of an object scanned in the context of a tomosynthesis, and apparatus for tomosynthesis 有权
公开(公告)号：US06442288B1
公开(公告)日：2002-08-27
申请号：US09207125
申请日：1998-12-07
申请人： Wolfgang Haerer , Guenter Lauritsch , Michael Zellerhoff
发明人： Wolfgang Haerer , Guenter Lauritsch , Michael Zellerhoff
IPC分类号： G06K900
CPC分类号： G06T11/006 , G01N23/044 , G01N2223/419 , G06T2211/421 , G06T2211/436
摘要： In a method for reconstruction of a three-dimensional image of an object scanned in linear or circular fashion in the context of a tomosynthesis. The object is transirradiated with X-rays from various projection angles &phgr; for the recording of the projection images, and the radiation exiting from the object is recorded by a detector that supplies digital output image signals. The output image signals representing the projection image data are supplied to a computer for image reconstruction. In the context of the reconstruction a filter is first produced, on the basis of the following steps: A 3D transmission function Hproj(&ohgr;x,&ohgr;y,&ohgr;z) is calculated from the recording geometry for the individual projection image recording and the back-projection of the individual projection images into the 3D reconstruction image volume. By approximation, the 3D transmission function Hproj(&ohgr;x,&ohgr;y,&ohgr;z) is inverted for the determination of an inversion function Hinv(&ohgr;x,&ohgr;y,&ohgr;z). A 3D filtering function Hopt(&ohgr;x,&ohgr;y,&ohgr;z) is produced dependent on one or more desired image characteristics of the reconstruction image. A resulting 3D filtering function Hfilter(&ohgr;x,&ohgr;y,&ohgr;z) is determined by multiplication of the 3D filtering function Hopt(&ohgr;x,&ohgr;y,&ohgr;z) and the inversion function Hinv(&ohgr;x,&ohgr;y,&ohgr;z). A 2D filtering function H2Dfilter,&phgr;(&ohgr;u,&ohgr;v) is determined from the resulting 3D filtering function Hfilter(&ohgr;u,&ohgr;v &ohgr;z) by coordinate transformation of the 3D object space into the 2D projection image space of the respective individual projection images at the projection angle &phgr;. After calculating the filter, the reconstruction of the image takes place in the computer by application of the 2D filtering function H2Dfilter,&phgr;(&ohgr;u,&ohgr;v) to the associated individual projection image data, and production of the reconstruction image by back-projection of the filtered individual projection image data, into the 3D reconstruction image volume.

5. 发明授权

US08285014B2 Measuring blood volume with C-arm computed tomography 有权
标题翻译：用C臂计算机断层扫描测量血容量
公开(公告)号：US08285014B2
公开(公告)日：2012-10-09
申请号：US12061357
申请日：2008-04-02
申请人： Guenter Lauritsch , Thomas Redel , Michael Zellerhoff
发明人： Guenter Lauritsch , Thomas Redel , Michael Zellerhoff
IPC分类号： G06K9/00 , H05G1/64
CPC分类号： A61B6/504 , A61B6/032 , A61B6/4441 , A61B6/481 , A61B6/507
摘要： A system and method of obtaining perfusion data for cerebral tissue is described. The system includes a C-arm X-ray device and a computing system configured to obtain sets of rotational projection X-ray data suitable for reconstructing 3D voxel data sets. A first data set is obtained of the patient, and then contrast material is injected into the vascular system to obtain a second 1 data set. A first voxel data set is subtracted from the second voxel data set, and the resultant data set is processed so as to segment the contrast-enhanced vasculature from the remaining data. The segmented voxels are subtracted from the resultant voxel data set, so as to yield a functional data set representing the difference between the attenuation of the tissues after administering contrast agent and the tissues prior to administering the contrast agent, without the contrast enhanced vasculature. The attenuation of the functional data set represents the perfusion or cerebral blood volume (CBV).
摘要翻译：描述了获得脑组织灌注数据的系统和方法。该系统包括C臂X射线装置和被配置为获得适于重建3D体元数据集的旋转投影X射线数据的组的计算系统。获得患者的第一数据集，然后将造影材料注入血管系统以获得第二个1数据集。从第二体素数据集中减去第一体素数据集，并且处理结果数据集，以便从剩余数据中分割对比度增强的脉管系统。从所得到的体元数据集中减去分割体素，从而产生表示施用造影剂之前的组织的衰减与施用造影剂之前的组织之间的差异的功能数据集，而没有对比度增强的脉管系统。功能数据集的衰减表示灌注或脑血容量（CBV）。

6. 发明授权

US07257186B2 Imaging method for a multi-slice spiral CT scan, and a computer tomography unit for carrying out this method 有权
标题翻译：用于多层螺旋CT扫描的成像方法和用于执行该方法的计算机断层摄影单元
公开(公告)号：US07257186B2
公开(公告)日：2007-08-14
申请号：US10686629
申请日：2003-10-17
申请人： Herbert Bruder , Guenter Lauritsch , Karl Stierstorfer , Kwok Tam
发明人： Herbert Bruder , Guenter Lauritsch , Karl Stierstorfer , Kwok Tam
IPC分类号： A61B6/03
CPC分类号： A61B6/032 , A61B6/027 , A61B6/06 , G06T11/006 , G06T2211/421 , Y10S378/901
摘要： An imaging method is disclosed for a multi-slice spiral CT scan. A CT unit is disclosed for carrying out this method. In the method, the filtering may be formed by use of multiple applications of a ramp filter and a masking operation to a projection image in a different sequence. The CT unit may include, for filtering purposes, multiple applications of a ramp filter and a masking operation to a projection image in a different sequence.
摘要翻译：公开了一种用于多层螺旋CT扫描的成像方法。公开了一种用于执行该方法的CT单元。在该方法中，可以通过使用斜坡滤波器的多个应用和对不同序列中的投影图像的掩蔽操作来形成滤波。为了过滤目的，CT单元可以以不同的顺序包括斜坡滤波器和掩蔽操作的多个应用到投影图像。

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