公开(公告)号：US20100177862A1

公开(公告)日：2010-07-15

申请号：US12686413

申请日：2010-01-13

申请人： Herbert Bruder ,  Thomas Flohr ,  Rainer Raupach

发明人： Herbert Bruder ,  Thomas Flohr ,  Rainer Raupach

IPC分类号： H05G1/60 ,  G06K9/00

CPC分类号： G06T11/006 ,  A61B6/027 ,  A61B6/507 ,  G06T2211/412 ,  G06T2211/421

摘要： A method is disclosed for scanning an examination object with a CT system and the generation of at least one computed tomographic sectional view from data obtained from the scanning and a CT system. In at least one embodiment, data used for generating the at least one sectional image is filtered out with different intensities as a function of a predetermined time range and/or projection angle range of the measurement of high local frequencies.

摘要翻译： 公开了一种用于使用CT系统扫描检查对象并从从扫描和CT系统获得的数据生成至少一个计算机断层图截面视图的方法。 在至少一个实施例中，用于产生至少一个截面图像的数据作为预定时间范围和/或高本地频率的测量的投影角范围的函数以不同的强度被滤除。

公开(公告)号：US20090122954A1

公开(公告)日：2009-05-14

申请号：US12289938

申请日：2008-11-07

申请人： Herbert Bruder

发明人： Herbert Bruder

IPC分类号： H05G1/60 ,  G06K9/00

CPC分类号： G06T11/005 ,  G06T2211/432

摘要： At least one embodiment of the present invention relates to a method for extrapolation of truncated, incomplete projections for computed tomography. At least one embodiment of the method is based on the use of CT units having multi-row detectors and scanning in spiral scan operation and includes at least the following. Firstly, scanning of an examination object with the aid of a beam. Secondly, detection of complete and incomplete projection data during a scan. Thirdly, the carrying out of a parallel rebinning for the detected projection data. Fourthly, determining incomplete, truncated projections based on analysis of the 3D signal path in the 3D sinogram belonging to each voxel in the object region. Fifthly, extrapolating the incomplete, truncated projections by continuing the terminated or discontinuous 3D signal paths according to P ^  ( r , Φ , z ) = min ( t , θ )  ( P θ  ( t  ( r , θ , Φ ) , q  ( z , θ ) ) · I θ  ( t ) ,  I  ( t ) = { 1 ∀ t = r · cos  ( θ + Φ ) , q = q  ( θ , z ) 0 otherwise .

公开(公告)号：US07529335B2

公开(公告)日：2009-05-05

申请号：US10544291

申请日：2004-01-28

申请人： Herbert Bruder ,  Günter Lauritsch ,  Karl Stierstorfer

发明人： Herbert Bruder ,  Günter Lauritsch ,  Karl Stierstorfer

IPC分类号： A61B6/00

CPC分类号： G06T11/006 ,  A61B6/027

摘要： A method is disclosed for generating computer tomography images using a 3D image reconstruction method. According to the method, to scan an object to be examined using a cone-shaped bundle of rays originating from a focal point and a planar, preferably multi-line detector for detecting the bundle of rays, the focal point is displaced along a spiral trajectory around the object to be examined. The detector delivers output data corresponding to the detected radiation and image voxels from the scanned examined object are reconstructed from the optionally pre-processed output data, the image voxels reflecting the attenuation coefficients of the respective voxel. Each image voxel is reconstructed separately from projection data, which covers a projection angular range of at least 108° and an approximate weighting is carried out for each voxel considered in order to standardize the projection data using the voxel.

摘要翻译： 公开了一种使用3D图像重建方法生成计算机断层图像的方法。 根据该方法，为了使用来自焦点的锥形光束和用于检测光束的平面，优选多线检测器来扫描待检查的物体，焦点沿着螺旋轨迹移位 围绕要检查的对象。 检测器提供与检测到的辐射相对应的输出数据，并且从可选的预处理的输出数据重建来自扫描的被检查物体的图像体素，反映各个体素的衰减系数的图像体素。 每个图像体素与投影数据分开重建，投影数据覆盖至少108°的投影角度范围，并且为了使用体素标准化投影数据，为每个体素执行近似权重。

公开(公告)号：US20080292171A1

公开(公告)日：2008-11-27

申请号：US12153416

申请日：2008-05-19

申请人： Herbert Bruder ,  Rainer Raupach ,  Bernhard Schmidt

发明人： Herbert Bruder ,  Rainer Raupach ,  Bernhard Schmidt

IPC分类号： G06K9/00 ,  A61B6/00

CPC分类号： G06T11/005

摘要： A method is disclosed for generating computed tomography displays, in which with the aid of at least one X-ray source, an examination object is scanned in a rotationally circulating fashion with a measured dose rate dependent on the circulation angle, projection data are collected from a multiplicity of viewing angles, and at least similarly redundant projection data from angularly identical or angularly complementary projection angles with a different measured dose are interpolated with distance weighted relative to a projection value and are used for reconstruction. According to at least one embodiment of the invention, during the distance weighted interpolation of the at least similarly redundant projection data an additional noise optimizing weighting is carried out as a function of the noise present per projection value. Furthermore, an X-ray computed tomography system is disclosed for generating tomographic displays of an examination object with the aid of an arithmetic logic unit, including computer program code for evaluating detector data and carrying out a reconstruction, the arithmetic logic unit including program code that during operation executes at least one embodiment of the method.

摘要翻译： 公开了一种用于生成计算机断层摄影显示的方法，其中借助于至少一个X射线源，以具有取决于循环角的测量剂量率的旋转循环方式扫描检查对象，从 多个视角，以及与具有不同测量剂量的角度相同或角度互补的投影角度的至少相似的冗余投影数据以相对于投影值加权的距离进行内插，并用于重建。 根据本发明的至少一个实施例，在至少类似地冗余的投影数据的距离加权内插期间，作为每个投影值存在的噪声的函数执行附加噪声优化加权。 此外，公开了一种X射线计算机断层摄影系统，用于借助于包括用于评估检测器数据并执行重建的计算机程序代码的算术逻辑单元产生检查对象的断层图像显示，所述算术逻辑单元包括程序代码， 在操作期间执行该方法的至少一个实施例。

公开(公告)号：US07457450B2

公开(公告)日：2008-11-25

申请号：US11043965

申请日：2005-01-28

申请人： Herbert Bruder ,  Thomas Flohr ,  Bjoern Heismann ,  Rainer Raupach ,  Karl Stierstorfer

发明人： Herbert Bruder ,  Thomas Flohr ,  Bjoern Heismann ,  Rainer Raupach ,  Karl Stierstorfer

IPC分类号： G06K9/00

CPC分类号： A61B6/032 ,  A61B6/4035 ,  A61B6/405 ,  A61B6/482 ,  Y10S378/901

摘要： A method is for recording and evaluating image data with the aid of a tomography machine. At least two recordings with different spectral distribution are made of an examination area of an object. Further, measured data obtained from the two recordings are evaluated such that additional information relating to the examination area and/or a specific representation of the image of the examination area are/is obtained from the different spectral distributions. The tomography machine includes at least two separate recording systems. Further, it is operated such that the two recording systems operate with a different spectral distribution. As such, the additional information and the specific representation of an image can be obtained in conjunction with a reduced scanning time.

摘要翻译： 一种用于通过断层摄影机记录和评估图像数据的方法。 具有不同光谱分布的至少两个记录由对象的检查区域构成。 此外，评估从两个记录获得的测量数据，使得从不同的光谱分布获得与检查区域相关的附加信息和/或检查区域的图像的特定表示。 断层摄影机包括至少两个单独的记录系统。 此外，其操作使得两个记录系统以不同的光谱分布进行操作。 因此，附加信息和图像的具体表示可以结合减少的扫描时间来获得。

公开(公告)号：US07443945B2

公开(公告)日：2008-10-28

申请号：US11790709

申请日：2007-04-27

申请人： Herbert Bruder ,  Karl Stierstorfer

发明人： Herbert Bruder ,  Karl Stierstorfer

IPC分类号： A61B6/00

CPC分类号： A61B6/5282 ,  A61B6/032 ,  A61B6/4014

摘要： It is proposed to estimate the scattered radiation on the basis of a sinogram, which is measured in any case. In at least one embodiment, a method includes determining the potential scattering site for each measuring beam from the object tangents in the sinogram and calculating the scattered intensity from the primary radiation striking the scattering site and the angle ratios of scattering beam, object tangent and measuring beam. Also proposed, in at least one embodiment, is an X-ray CT having at least bifocal detector systems and a control and computer unit for producing tomographic pictures, the control and arithmetic unit of which contains a program code that, upon being executed, carries out the method.

摘要翻译： 建议基于正弦图估计散射辐射，这是在任何情况下测量的。 在至少一个实施例中，一种方法包括从正弦图中的物体切线确定每个测量光束的潜在散射位置，并计算来自发射散射位置的主要辐射的散射强度和散射光束的角度比，物体切线和测量 光束。 在至少一个实施例中还提出了具有至少双焦点检测器系统的X射线CT和用于产生断层图像的控制和计算机单元，其控制和运算单元包含程序代码，所述程序代码在被执行时携带 出来的方法。

公开(公告)号：US07440536B2

公开(公告)日：2008-10-21

申请号：US11543836

申请日：2006-10-06

申请人： Herbert Bruder ,  Martin Petersilka ,  Rainer Raupach ,  Karl Stierstorfer

发明人： Herbert Bruder ,  Martin Petersilka ,  Rainer Raupach ,  Karl Stierstorfer

IPC分类号： G01N23/00

CPC分类号： G03B42/02 ,  A61B6/032 ,  A61B6/4014 ,  A61B6/5282 ,  A61B6/583

摘要： A method for scattered radiation correction of a CT system, including at least two focus/detector systems operated angularly offset from one another, is disclosed. In the method, at at least one phantom, similar to the examined object at least in a subregion, for at least one of the focus/detector systems, the scattered radiation intensity occurring is determined in the detector of a focus/detector system during the operation of the at least one focus of at least one other focus/detector system. Further, the spatial distribution thereof is stored for a number of angles of rotation of the focus/detector systems. During scanning of the object, the scattered radiation intensities, determined with the aid of a similar phantom that originate from the at least one other focus/detector system, are subtracted from the measured intensities of the first focus/detector system while taking account of the spatial orientation of the focus/detector systems and the beam respectively considered. Finally, absorption values are calculated with the aid of the intensity values thus corrected, and CT pictures or CT volume data are thereby reconstructed.

摘要翻译： 公开了一种用于CT系统的散射辐射校正的方法，其包括彼此角度偏移地操作的至少两个焦点/检测器系统。 在该方法中，至少在至少一个子区域中的被检查对象的至少一个体模，对于焦点/检测器系统中的至少一个，在焦点/检测器系统的检测器期间确定发生的散射辐射强度 操作至少一个其它焦点/检测器系统的至少一个焦点。 此外，其空间分布被存储为聚焦/检测器系统的多个旋转角度。 在扫描对象期间，借助于来自至少一个其它焦点/检测器系统的类似幻影确定的散射辐射强度从所测量的第一焦点/检测器系统的强度中减去，同时考虑到 分别考虑了焦点/探测器系统和光束的空间取向。 最后，借助于如此校正的强度值来计算吸收值，由此重建CT图像或CT体积数据。

公开(公告)号：US07369639B2

公开(公告)日：2008-05-06

申请号：US11349125

申请日：2006-02-08

申请人： Herbert Bruder

发明人： Herbert Bruder

IPC分类号： G21N23/083 ,  A61B6/00

CPC分类号： A61B6/541 ,  A61B6/503

摘要： A method and a tomography unit are disclosed for taking tomographic pictures of a patient's beating heart, in particular X-ray CT pictures. In such a method and tomography unit, only detector data or image data of a portion of the cardiac phase from one or more heart beats is used for taking a picture. Further, at least one pressure signal, produced by the mechanical cardiac pulse and varying temporally with the cardiac cycle, is used for determining the cardiac phase.

摘要翻译： 公开了一种用于拍摄患者跳动心脏的断层图像的方法和断层摄影单元，特别是X射线CT图像。 在这种方法和断层摄影单元中，仅使用来自一个或多个心跳的心脏相的一部分的检测器数据或图像数据进行拍摄。 此外，由机械心脏脉搏产生并随着心律周期变化的至少一个压力信号用于确定心脏相位。

公开(公告)号：US20070232888A1

公开(公告)日：2007-10-04

申请号：US11727751

申请日：2007-03-28

申请人： Herbert Bruder ,  Rainer Raupach

发明人： Herbert Bruder ,  Rainer Raupach

IPC分类号： A61B5/05

CPC分类号： G06T3/4007 ,  A61B6/032 ,  A61B6/503 ,  A61B6/5217 ,  G06T7/246 ,  G06T2207/30048 ,  G06T2211/412

摘要： A method is disclosed for reducing step artifacts in the forward increment direction of a cardio CT representation. In at least one embodiment, volume recordings or section images of first and second sub-volumes of a heart volume, which lie adjacent to one another in the forward increment direction and partially overlap in an overlap region, are recorded by a computer tomography system. Each sub-volume's detector data is used for the reconstruction coming from different heart cycles. Finally, a displacement vector relative to a second sub-volume is determined at least for a selected point of the overlap region of a first sub-volume and the second sub-volume is subjected at least partially to a spatial transformation according to the at least one displacement vector.

摘要翻译： 公开了一种用于减少心脏CT表示的向前增量方向上的步骤伪像的方法。 在至少一个实施例中，通过计算机断层摄影系统记录心脏体积的第一和第二子体积的体积记录​​或分段图像，其以正向增量方向彼此相邻并且在重叠区域中部分重叠。 每个子体积的检测器数据用于来自不同心脏周期的重建。 最后，至少对于第一子体积的重叠区域的选定点确定相对于第二子体积的位移矢量，并且至少部分地将第二子体积至少部分地进行空间变换，至少 一个位移矢量。

公开(公告)号：US07277522B2

公开(公告)日：2007-10-02

申请号：US11482263

申请日：2006-07-06

申请人： Herbert Bruder ,  Martin Petersilka ,  Karl Stierstorfer

发明人： Herbert Bruder ,  Martin Petersilka ,  Karl Stierstorfer

IPC分类号： G01N23/00

CPC分类号： G01T1/2985 ,  A61B6/583

摘要： In a method for non-iterative focus adjustment in a CT apparatus the position of the center ray with regard to the movement direction of the focus and the correct phase between the detector sampling frequency and the focus springing frequency are calculated with a minimal number of sinogram acquisitions and is adjusted without iterative steps, corresponding to predetermined values.

摘要翻译： 在CT装置中用于非迭代聚焦调整的方法中，相对于焦点的移动方向的中心射线的位置和检测器采样频率与聚焦弹起频率之间的正确相位的计算是用最小数量的正弦图 并且在没有迭代步骤的情况下进行调整，对应于预定值。