公开(公告)号：US06327326B1

公开(公告)日：2001-12-04

申请号：US09448551

申请日：1999-11-23

申请人： Thomas Flohr ,  Bernd Ohnesorge ,  Heinrich Wallschlaeger

发明人： Thomas Flohr ,  Bernd Ohnesorge ,  Heinrich Wallschlaeger

IPC分类号： A61B603

CPC分类号： G01N23/046 ,  G01N2223/419 ,  G01N2223/612

摘要： In a method for image reconstruction in a computed tomography apparatus, whereby only the minimally possible projection angle range &agr;g(&bgr;) for the respective fan angle &bgr; is employed for all measured values S(&bgr;, &agr;) of the same fan angle &bgr;.

摘要翻译： 在用于计算机断层摄影装置中的图像重建的方法中，其中相同扇形角度β的所有测量值S（β，α）仅使用相应风扇角度β的最小可能投影角度范围α（β）。

公开(公告)号：US5987157A

公开(公告)日：1999-11-16

申请号：US829955

申请日：1997-04-01

申请人： Stefan Schaller ,  Thomas Flohr ,  Heinrich Wallschlaeger

发明人： Stefan Schaller ,  Thomas Flohr ,  Heinrich Wallschlaeger

IPC分类号： A61B6/03 ,  A61B5/055 ,  G06T11/00 ,  G06K9/00

CPC分类号： G06T11/005 ,  G06T11/006 ,  A61B6/027 ,  G06T2211/421 ,  Y10S378/901

摘要： In an image reconstruction method for a multi-row detector computed tomography apparatus operable in a helical/spiral scan mode, a spiral reconstruction with arbitrary pitch and an improvement of the z resolution with interlaced sampling are achieved by using the known Wang reconstruction algorithm expanded by a new type of interpolation technique wherein direct and complementary projections are employed those beams of either the direct or complementary projection always being selected which exhibit the smallest distance in the z-direction from the relevant voxel to be reconstructed.

摘要翻译： 在以螺旋/螺旋扫描模式操作的多行检测器计算机断层摄影装置的图像重建方法中，通过使用已知的王重建算法来实现具有任意间距的螺旋重建和具有隔行扫描的z分辨率的改善， 一种新型插值技术，其中采用直接和互补投影的那些直接或互补投影总是被选择的那些光束，其在z方向上表现出与要重构的相关体素的最小距离。

公开(公告)号：US5577501A

公开(公告)日：1996-11-26

申请号：US313388

申请日：1994-09-27

申请人： Thomas Flohr ,  Heinrich Wallschlaeger

发明人： Thomas Flohr ,  Heinrich Wallschlaeger

IPC分类号： A61B6/03 ,  G01N23/04 ,  G06T1/00 ,  A61B5/05

CPC分类号： G01N23/046 ,  G01N2223/419

摘要： In a computed tomography apparatus wherein an examination subject is irradiated by an x-ray beam from a number of different angular positions, a measured data set is obtained in a first geometry, and the reconstruction of the tomographic image ensues by interpolation of the measured data in a second geometry. The interpolation results in an unwanted smoothing of the data. In order to compensate for this smoothing, the data in the frequency space are divided by the average Fourier transform of the interpolation function, or alternatively, a discrete convolution of the data in the spatial domain is undertaken.

摘要翻译： 在其中通过来自多个不同角位置的X射线束照射检查对象的计算机断层摄影装置中，以第一几何形状获得测量数据集，并且通过内插测量数据进行重建， 在第二个几何。 插值会导致数据的不需要的平滑。 为了补偿该平滑，将频率空间中的数据除以内插函数的平均傅里叶变换，或者替代地进行空间域中的数据的离散卷积。

公开(公告)号：US07822467B2

公开(公告)日：2010-10-26

申请号：US10984834

申请日：2004-11-10

申请人： Thomas Flohr ,  Bernd Ohnesorge ,  Stefan Schaller

发明人： Thomas Flohr ,  Bernd Ohnesorge ,  Stefan Schaller

IPC分类号： A61B5/05

CPC分类号： A61B6/541 ,  A61B6/027 ,  A61B6/032 ,  A61B6/503 ,  A61B6/504

摘要： A method is for producing CT images of at least one second organ cyclically excited to move by a first organ moving on its own, or examination area with rest phases and activity phases of a patient. The second organ or the examination area is scanned, preferably spirally. A three-dimensional image of the absorption coefficient is determined with the aid of a multiplicity of cutting planes on the basis of the data obtained by scanning in the rest phase of the second organ or examination area, and the movement information required to determine the rest phase is collected from the first organ.

摘要翻译： 一种用于产生至少一个第二器官的CT图像的方法，所述至少一个第二器官通过自身移动的第一器官或患者的休息期和活动期的检查区域周期性地激发移动。 扫描第二个器官或检查区域，最好是螺旋状扫描。 基于通过在第二器官或检查区域的休息阶段扫描获得的数据和确定休息所需的移动信息，借助于多个切割平面来确定吸收系数的三维图像 阶段是从第一个器官收集的。

公开(公告)号：US07570983B2

公开(公告)日：2009-08-04

申请号：US10693586

申请日：2003-10-24

申请人： Christoph Becker ,  Roman Fischbach ,  Thomas Flohr ,  Andreas Kopp ,  Bernd Ohnesorge ,  Stefan Schaller

发明人： Christoph Becker ,  Roman Fischbach ,  Thomas Flohr ,  Andreas Kopp ,  Bernd Ohnesorge ,  Stefan Schaller

IPC分类号： A61B5/00

CPC分类号： A61B5/02007 ,  A61B5/7285 ,  A61B6/00 ,  A61B6/032 ,  A61B6/4085 ,  A61B6/481 ,  A61B6/504 ,  A61B6/541 ,  A61B8/543

摘要： In a method to support the diagnosis and/or therapy of a pathological change of a blood vessel of a patient, in particular in the context of coronary heart disease at a first point in time of a pixel-based or voxel-based first image is acquired with the blood vessel of interest by an imaging method, a determination is made from the first image of a quantity of existing non-calcified plaque and a quantity of existing calcium-rich plaque, a determination of a first indicator value is made from the quantities of the different plaque types that represents a measurement of the quantity and the composition of plaque present in the blood vessel at the first point in time, a comparison of the first indicator value is made with at least one limit value stored in a storage of a data processing device, and dependent on the comparison, a presentation is made on an output unit associated with the electronic data processing device of either a proposal for a measure to be undertaken on the patient, or a proposal for no measure.

摘要翻译： 在基于像素或基于体素的第一图像的第一时间点的支持诊断和/或治疗患者的血管的特别是在冠心病的情况下的诊断和/或治疗的方法是 通过成像方法用感兴趣的血管获取，从现有的非钙化斑块的量的第一图像和现有的富含钙的斑块的量确定第一指示剂值的确定是从 表示在第一时间点存在于血管中的斑块的量和组成的测量的不同斑块类型的量，第一指示剂值的比较与存储在存储器中的至少一个限制值进行比较 数据处理装置，并且根据比较，在与电子数据处理装置相关联的输出单元上呈现关于在患者上进行的措施的提案，o 一个不采取措施的提案。

公开(公告)号：US06560309B1

公开(公告)日：2003-05-06

申请号：US09724055

申请日：2000-11-28

申请人： Christoph Becker ,  Thomas Flohr ,  Bernd Ohnesorge

发明人： Christoph Becker ,  Thomas Flohr ,  Bernd Ohnesorge

IPC分类号： G01N2300

CPC分类号： A61B6/541 ,  A61B6/027 ,  G03B42/02 ,  H05G1/34

摘要： In a method for examining a body region executing a periodic motion in an examination subject with a diagnostic apparatus having a radiation source for generating radiation penetrating the examination subject and a detector system for the radiation emanating from the radiation source, the intensity of the radiation emanating from the radiation source is modulated between a reference value and a reduced value compared to the reference value, substantially synchronously with the movement, so that the reference value is present during a phase of the periodic motion to be imaged with the diagnostic apparatus, and substantially only the data that were output by the detector system during the presence of the reference value of the radiation are utilized for the determination of the image.

摘要翻译： 在利用具有用于产生穿过检查对象的辐射源的辐射源的诊断装置和用于从辐射源发出的辐射的检测器系统来检查检查对象中执行周期性运动的身体区域的方法中，辐射发射的强度 与基准值相比，辐射源在与基准值相比基准值和减小的值之间进行调制，与移动基本上同步，使得参考值在与诊断装置成像的周期性运动的相位期间存在， 仅在辐射的参考值存在期间由检测器系统输出的数据被用于图像的确定。

公开(公告)号：US06381487B1

公开(公告)日：2002-04-30

申请号：US09451228

申请日：1999-11-29

申请人： Thomas Flohr ,  Bernd Ohnesorge

发明人： Thomas Flohr ,  Bernd Ohnesorge

IPC分类号： A61B505

CPC分类号： A61B6/541 ,  A61B6/032 ,  A61B6/4085 ,  G01N23/04

摘要： In a method and CT apparatus for producing CT images of a body region periodically moving with resting or motion phases, data corresponding to a number of projections serving the purpose of imaging are analyzed to determine whether each projection was acquired during a resting or motion phase, and only those data that were acquired during a resting phase are employed for image reconstruction.

摘要翻译： 在用于产生以休息或运动相位周期性移动的身体区域的CT图像的方法和CT装置中，分析与用于成像目的的多个投影对应的数据，以确定在休息或运动阶段期间是否获取每个投影， 并且仅将在静止阶段获取的数据用于图像重建。

公开(公告)号：US07187745B2

公开(公告)日：2007-03-06

申请号：US10675302

申请日：2003-09-30

申请人： Thomas Flohr ,  Klaus Klingenbeck-Regn ,  Bernd Ohnesorge ,  Rainer Rienmueller

发明人： Thomas Flohr ,  Klaus Klingenbeck-Regn ,  Bernd Ohnesorge ,  Rainer Rienmueller

IPC分类号： A61B6/00

CPC分类号： A61B6/032 ,  A61B5/0452 ,  A61B6/503 ,  A61B6/541

摘要： In a method and device for, generating computed tomography images of a periodically moving organ of an organism, the organ having regions with rest phases and movement phases and the rest phases of different regions ensuing at different points in time, an x-ray source is moved around the body of the organism to be examined to generate projections serving for the image generation during at least one rotation of the x-ray source around the subject to be examined and during a duration that is at least equal to a period of the motion. The projection data are analyzed as to whether the data were acquired during a rest phase or movement phase of a respective region of interest of the organ, and an image of the organ is reconstructed using only data acquired during a rest phase of a respective region of interest of the organ.

摘要翻译： 在用于生成生物周期性移动的器官的计算机断层摄影图像的方法和装置中，所述器官具有具有静止相位和运动阶段的区域，并且不同区域的其余阶段随后在不同的时间点，x射线源 在待检查的生物体的身体周围移动以产生用于在待检查对象周围的x射线源的至少一次旋转期间以及在至少等于运动周期的持续时间期间用于图像生成的投影 。 分析投影数据是否在器官的相关感兴趣区域的休止阶段或运动阶段获取数据，并且仅使用在各个区域的休止阶段期间获取的数据来重构器官的图像 器官兴趣。

公开(公告)号：US06400790B1

公开(公告)日：2002-06-04

申请号：US09450388

申请日：1999-11-29

申请人： Bernd Ohnesorge ,  Thomas Flohr

发明人： Bernd Ohnesorge ,  Thomas Flohr

IPC分类号： A61B603

CPC分类号： G06T11/005 ,  A61B6/027 ,  G01N23/04 ,  Y10S378/901

摘要： In a method for image reconstruction for a CT apparatus and CT apparatus for the implementation of such a method, acquisition of the data underlying an image reconstruction for an image plane at a specific position on the system axis ensues by combining measured values, for each individual projection angle needed for this image reconstruction, that are registered exclusively for this projection angle with different lines of detector elements, to form data apparently registered with a detector having only one line of detector elements, with a weighting of the measured values ensuing. The image reconstruction is then undertaken using a conventional algorithm for operating on data from a detector having only one line of detector elements.

摘要翻译： 在用于实现这种方法的CT装置和CT装置的图像重建方法中，通过组合每个个体的测量值来获取在系统轴上的特定位置处的用于图像平面的图像重建的数据的采集 该图像重构所需的投影角度，其专门用于具有不同线的检测器元件的该投影角度，以形成显着地与仅具有一行检测器元件的检测器对准的数据，并且随后测量值的加权。 然后使用用于对仅具有一行检测器元件的检测器的数据进行操作的常规算法进行图像重建。

公开(公告)号：US06845141B2

公开(公告)日：2005-01-18

申请号：US10048516

申请日：2001-05-17

申请人： Thomas Flohr ,  Bernd Ohnesorge ,  Thomas von der Haar

发明人： Thomas Flohr ,  Bernd Ohnesorge ,  Thomas von der Haar

IPC分类号： G01N23/04 ,  A61B6/03 ,  G06T1/00 ,  G06T11/00 ,  G01N23/00

CPC分类号： G06T11/006

摘要： A computed tomography apparatus has a radiation source from which a beam is emitted which has a fan angle and can be moved about a system axis within a measuring field defined by the fan angle in order to scan an object under examination, and a detector system for detecting the radiation from the radiation source and which supplies output signals corresponding to the received radiation, which are fed to a computer. From these output signals, the computer reconstructs images of the object under examination with reference to a reconstruction field which is larger than the measuring field.

摘要翻译： 计算机断层摄影装置具有辐射源，从该射线源发射具有扇角的光束，并且可以围绕由扇形角定义的测量场内的系统轴线移动，以扫描被检查物体;以及检测器系统， 检测来自辐射源的辐射并且提供对应于被接收的辐射的输出信号，所述辐射被馈送到计算机。 根据这些输出信号，计算机参照大于测量场的重建场重建检查对象的图像。