公开(公告)号：US06665370B2

公开(公告)日：2003-12-16

申请号：US10191628

申请日：2002-07-09

申请人： Herbert Bruder ,  Thomas Flohr ,  Robert Mayer ,  Bernd Ohnesorge ,  Stefan Schaller ,  Karl Stierstorfer

发明人： Herbert Bruder ,  Thomas Flohr ,  Robert Mayer ,  Bernd Ohnesorge ,  Stefan Schaller ,  Karl Stierstorfer

IPC分类号： A61B603

CPC分类号： A61B6/032 ,  A61B6/027 ,  A61B6/4447 ,  A61B6/503 ,  G01N23/046 ,  G01N2223/419 ,  G01N2223/612

摘要： In a spiral scan cone beam computed tomography method and apparatus, the output data are divided into sub-segments being shorter than the length required for the reconstruction of a CT image. Segment images having inclined image plane relative to the system axis are reconstructed for the sub-segments. A signal reproducing the time curve of the periodic motion is acquired during the scanning. A z-position on the system axis and a time position with respect to the periodic motion are allocated to the segment images. Segment images belonging to a desired range of z-positions and a desired range of time positions are selected such that the corresponding sub-segments have an overall length adequate for the reconstruction of a CT image. The selected segment images are at least indirectly combined into a resulting CT image with respect to a target image plane.

摘要翻译： 在螺旋扫描锥束计算机断层摄影方法和装置中，输出数据被划分成比CT图像的重建所需的长度短的子段。 对于子段重建具有相对于系统轴的倾斜图像平面的段图像。 在扫描期间获取再现周期性运动的时间曲线的信号。 系统轴上的z位置和相对于周期运动的时间位置被分配给段图像。 选择属于期望的Z位置范围和期望的时间位置范围的段图像，使得对应的子段具有足以用于重建CT图像的总长度。 所选择的段图像至少间接地组合成相对于目标图像平面的结果CT图像。

公开(公告)号：US06819736B1

公开(公告)日：2004-11-16

申请号：US10371702

申请日：2003-02-20

申请人： Herbert Bruder ,  Bernd Ohnesorge ,  Karl Stierstorfer ,  Thomas Flohr ,  Stefan Schaller

发明人： Herbert Bruder ,  Bernd Ohnesorge ,  Karl Stierstorfer ,  Thomas Flohr ,  Stefan Schaller

IPC分类号： A61B603

CPC分类号： A61B6/4028 ,  A61B6/027 ,  A61B6/032 ,  A61B6/4233 ,  A61B6/503 ,  G06T11/006 ,  G06T2211/412 ,  Y10S378/901

摘要： The invention relates to a method for performing computer tomography, and to a computed tomography (CT) apparatus, in which a) for scanning an object by a cone-shaped beam exiting from a focal point and by a matrix-like detector array for detecting the beam, the focal point is moved in relation to the object on a spiral path, whose center axis corresponds to a system axis, and the detector array provides output data corresponding to the received radiation; and b) for imaging an object region that executes a periodic motion, a signal that reproduces the course over time of the periodic motion is obtained during the scanning; c) from output data furnished during the motion of the focal point on a spiral segment, images with an inclined image plane are reconstructed, the image planes being inclined relative to the system axis both about a first axis, which perpendicularly intersects the system axis, by an angle of inclination &ggr; and about a second axis, which perpendicularly intersects both the first axis and the system axis, by a tilt angle &dgr;; and spiral segments that immediately succeed one another overlap one another by an overlap angle that is greater than or equal to zero; and the spiral segments are selected, taking into account the signal that reproduces the course over time of the periodic motion, such that they correspond to a phase of the periodic motion that is to be imaged.

摘要翻译： 本发明涉及一种用于执行计算机断层摄影的方法，以及计算机断层摄影（CT）装置，其中a）通过从焦点出射的锥形束和用于检测的矩阵状检测器阵列扫描物体 光束，焦点相对于螺旋路径上的物体移动，螺旋路径的中心轴对应于系统轴，并且检测器阵列提供对应于接收到的辐射的输出数据; 以及b）为了对执行周期性运动的对象区域进行成像，在扫描期间获得在周期性运动中再现该过程的信号; c）从在焦点的运动中在螺旋段上提供的输出数据中重建具有倾斜图像平面的图像，图像平面相对于垂直于系统轴线的第一轴线相对于系统轴线倾斜， 通过与第一轴和系统轴两者垂直相交的倾斜角γ和大约第二轴的倾斜角δ; 并且立即成功的螺旋段彼此重叠大于或等于零的重叠角; 并且考虑到再现周期性运动的时间过程的信号，使得它们对应于要成像的周期性运动的相位，并选择螺旋段。

公开(公告)号：US06556697B1

公开(公告)日：2003-04-29

申请号：US09396337

申请日：1999-09-15

申请人： Herbert Bruder ,  Thomas Flohr ,  Bernd Ohnesorge ,  Stefan Schaller ,  Bernhard Scholz

发明人： Herbert Bruder ,  Thomas Flohr ,  Bernd Ohnesorge ,  Stefan Schaller ,  Bernhard Scholz

IPC分类号： G06K900

CPC分类号： A61B6/541 ,  A61B5/0456 ,  A61B6/027 ,  A61B6/032 ,  A61B6/4085

摘要： In an image reconstruction method for imaging a periodically moving object with a computed tomography apparatus employing a multi-line detector unit, suitable selection of the rotational speed of the carrier of the computed tomography apparatus and employment of a three-dimensional back-projection algorithm, allow qualitatively high-great images of the object to be produced in every motion phase.

摘要翻译： 在利用采用多线检测器单元的计算机断层摄影装置对周期性运动物体进行成像的图像重建方法中，对计算机断层摄影装置的载体的旋转速度进行合适的选择并使用三维反投影算法， 允许在每个运动阶段产生对象的定性高伟大图像。

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。

公开(公告)号：US07058156B2

公开(公告)日：2006-06-06

申请号：US10686596

申请日：2003-10-17

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

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

IPC分类号： A61B6/03

CPC分类号： A61B6/032 ,  A61B6/027 ,  A61B6/466 ,  G06T11/006 ,  G06T2211/421

摘要： An imaging method is for a multi-slice spiral CT scan with 3D back projection. Use is made, for the reconstruction of the absorption value of at least one voxel, of the measured and filtered data that are produced by rays which penetrate the at least one voxel. A CT unit is further used to carry out the method. In the method, the filtering of the data, required for the reconstruction, in the image of the virtual detector is performed in the direction of the projection of spiral segments imaged thereon which are produced by the spiral scanning over a prescribed angular range. The CT unit includes a device for carrying out directional filtering of this type.

摘要翻译： 一种成像方法是用于具有3D背投影的多层螺旋CT扫描。 对于通过穿透至少一个体素的射线产生的测量和滤波的数据，用于重构至少一个体素的吸收值。 进一步使用CT单元执行该方法。 在该方法中，在虚拟检测器的图像中对在虚拟检测器的图像中进行重建所需要的数据的滤波是在其上成像的螺旋段的投影方向上执行的，这些螺旋段是通过螺旋扫描在规定的角度范围内产生的。 CT单元包括用于执行这种类型的方向滤波的装置。

公开(公告)号：US07277524B2

公开(公告)日：2007-10-02

申请号：US11169913

申请日：2005-06-30

申请人： Herbert Bruder ,  Thomas Flohr ,  Ernst Klotz ,  Karl Stierstorfer

发明人： Herbert Bruder ,  Thomas Flohr ,  Ernst Klotz ,  Karl Stierstorfer

IPC分类号： A61B6/00

CPC分类号： A61B6/032 ,  A61B5/1075 ,  A61B6/027 ,  A61B6/4085 ,  A61B6/461 ,  G01N23/046 ,  G01N2223/419 ,  G01N2223/612

摘要： A method is disclosed for a multislice computer assisted tomograph, capable of carrying out a spiral scan of an object volume with a pitch p selected to be small enough that each slice of the object volume is multiply detected during the spiral scan. The method includes calculating, using measured data of two temporally consecutive at least one of revolutions and half revolutions, an image of the object volume from which a change inside the object volume between the two temporally consecutive at least one of revolutions and half revolutions is directly visible. An embodiment of the method can permit, for example, the detection and visualization of dynamic processes with an enhanced time resolution.

摘要翻译： 公开了一种用于多层计算机辅助断层摄影机的方法，其能够对所选择的节距p的物体体积进行螺旋扫描，所述间距p被选择为足够小，使得在螺旋扫描期间对对象体积的每个切片进行乘法检测。 该方法包括使用两个时间上连续的至少一个旋转和半圈的测量数据来计算在两个时间上连续的至少一个转和半转之间的对象体积内的变化直接在其中的对象体积的图像 可见。 该方法的实施例可以允许例如具有增强的时间分辨率的动态过程的检测和可视化。

公开(公告)号：US07238944B2

公开(公告)日：2007-07-03

申请号：US10507896

申请日：2003-03-07

申请人： Herbert Bruder ,  Thomas Flohr ,  Karl Stierstorfer

发明人： Herbert Bruder ,  Thomas Flohr ,  Karl Stierstorfer

IPC分类号： G01T1/20

CPC分类号： G01T1/2018 ,  G01T1/1642 ,  G21K1/025

摘要： A detector for x-ray computer tomography scanners, includes a number of adjacent detector lines extending in an x direction, whereby each detector line is formed from a multitude of adjacent scintillator elements. In order to increase the resolution in the z direction and to simplify the design of the detector, the surface of the scintillator elements are partially covered, which further serves to reduce the size of the aperture in the z direction.

摘要翻译： 用于x射线计算机断层扫描仪的检测器包括沿x方向延伸的多个相邻的检测器线，由此每个检测器线由多个相邻的闪烁体元件形成。 为了提高z方向的分辨率和简化检测器的设计，闪烁体元件的表面被部分地覆盖，这进一步用于减小孔径在z方向上的尺寸。

公开(公告)号：US06658081B2

公开(公告)日：2003-12-02

申请号：US10164234

申请日：2002-06-05

申请人： Herbert Bruder ,  Thomas Flohr ,  Karl Stierstorfer

发明人： Herbert Bruder ,  Thomas Flohr ,  Karl Stierstorfer

IPC分类号： A61B603

CPC分类号： A61B6/032 ,  A61B6/027 ,  A61B6/4085 ,  A61B6/4233 ,  Y10S378/901

摘要： In a method and apparatus for computed tomography, a subject is scanned with a conical ray beam emanating from a focus and the attenuated beam is detected with a matrix-like detector array. The focus is moved on a spiral path around a system axis relative to the subject, and the detector array supplies output data corresponding to the received radiation. The output data are supplied during the motion of the focus on a spiral segment and have a length adequate for the reconstruction of a CT image, and are divided into output datasets with respect to sub-segments. Segment images having an inclined image plane relative to the system axis are reconstructed for the sub-segments. The segment images respectively belonging to the sub-segments are combined into a partial image with respect to a target image plane, and the partial images are combined into a resulting CT image with respect to the target image plane.

公开(公告)号：US20110317901A1

公开(公告)日：2011-12-29

申请号：US13164796

申请日：2011-06-21

申请人： Thomas Allmendinger ,  Herbert Bruder ,  Thomas Flohr ,  Rainer Raupach ,  Harald SchÖndube ,  Karl Stierstorfer

发明人： Thomas Allmendinger ,  Herbert Bruder ,  Thomas Flohr ,  Rainer Raupach ,  Harald SchÖndube ,  Karl Stierstorfer

IPC分类号： G06K9/00

CPC分类号： A61B6/032 ,  A61B6/4441 ,  A61B6/481 ,  A61B6/486 ,  A61B6/503 ,  A61B6/507 ,  A61B6/5211 ,  A61B6/5264 ,  A61B6/5288 ,  A61B2090/3762 ,  G06T5/002 ,  G06T5/50 ,  G06T11/006 ,  G06T2207/10081 ,  G06T2207/20221 ,  G06T2207/30048 ,  G06T2211/412 ,  G06T2211/436

摘要： A method is disclosed for the reconstruction of picture data of a moving object under examination from measurement, with the measurement data having been recorded beforehand for a relative rotational movement between a radiation source of a computed tomography system and the object under examination. In at least one embodiment, first picture data is computed from a complete measurement dataset of the measurement data for a picture reconstruction, and second picture data is computed from an incomplete measurement dataset for a computed tomography picture reconstruction. The first picture data and the second picture data are combined into third picture data, with the combination being computed using location-dependent movement information of the object under examination.

摘要翻译： 公开了一种用于重建从测量中检查的移动物体的图像数据的方法，其中测量数据已被预先记录在计算机断层摄影系统的辐射源和被检查物体之间的相对旋转运动。 在至少一个实施例中，从用于图像重建的测量数据的完整测量数据集计算第一图像数据，并且从用于计算机断层摄影图像重建的不完整测量数据集计算第二图像数据。 将第一图像数据和第二图像数据组合成第三图像数据，使用正在检查的对象的位置相关运动信息来计算组合。

公开(公告)号：US07313214B2

公开(公告)日：2007-12-25

申请号：US11100531

申请日：2005-04-07

申请人： Herbert Bruder ,  Thomas Flohr ,  Karl Stierstorfer

发明人： Herbert Bruder ,  Thomas Flohr ,  Karl Stierstorfer

IPC分类号： A61B6/03 ,  G01N23/083

CPC分类号： A61B6/032 ,  A61B6/4028 ,  A61B6/4085 ,  G01N23/046 ,  G01N2223/419

摘要： A computed tomography unit includes at least one X-ray tube, that scans an object in a fashion rotating in a circle or spiral about a z-axis, in combination with an oppositely situated detector having a multiplicity of detector rows. Each detector row includes an aperture Δz in the z-direction, having a multiplicity of detector elements. Between the X-ray tube and detector, a detector diaphragm is arranged that reduces the aperture Δz of the detector rows in the z-direction. The X-ray tube includes a focus, of variable location relative to the X-ray tube and which alternatingly assumes during scanning at least two different positions that have different z-coordinates relative to the X-ray tube R.

摘要翻译： 计算机断层摄影单元包括至少一个X射线管，其以相对位置的具有多个检测器行的检测器的组合，以围绕z轴旋转的方式扫描物体或旋转物体。 每个检测器行包括沿z方向的孔径Deltaz，具有多个检测器元件。 在X射线管和检测器之间，布置了检测器膜片，其减小了检测器行在z方向上的孔径Deltaz。 X射线管包括相对于X射线管可变位置的焦点，并且在扫描期间交替地假设相对于X射线管R具有不同z坐标的至少两个不同位置。