公开(公告)号：US20100195787A1

公开(公告)日：2010-08-05

申请号：US12695256

申请日：2010-01-28

申请人： Thomas Flohr ,  Rainer Raupach ,  Karl Stierstorfer

发明人： Thomas Flohr ,  Rainer Raupach ,  Karl Stierstorfer

IPC分类号： H05G1/60 ,  G06K9/00

CPC分类号： A61B6/482 ,  A61B6/032 ,  A61B6/4014 ,  A61B6/405 ,  A61B6/507 ,  A61B6/541

摘要： A method and a device are disclosed for generating a CT image with a high time resolution using a computed tomography scanner which has at least two recording systems which are operated at different X-ray energy spectra. In at least one embodiment of the process, CT images are firstly reconstructed in each case from a semi-rotation with the two recording systems, with irradiated lengths of the contrast agent-enriched structures and the soft tissue being calculated therefrom. Subsequently, a common X-ray energy is assumed and artificial measurement data records are calculated therefor, using the knowledge of the irradiated lengths for both recording systems at the same common X-ray energy. The artificial measurement data of respectively a quarter-rotation per recording system is then used to calculate the final CT image with a high time resolution. The method affords the use of dual-energy scans without losing the high time resolution available in dual-source systems.

摘要翻译： 公开了一种用于使用计算机断层摄影扫描仪生成具有高时间分辨率的CT图像的方法和装置，该计算机断层摄影扫描仪具有在不同X射线能谱下操作的至少两个记录系统。 在该过程的至少一个实施例中，首先在两个记录系统的半旋转中重建CT图像，其中计算富含造影剂的结构和软组织的照射长度。 随后，假设使用常见的X射线能量，并且使用相同共同的X射线能量对两个记录系统的照射长度的知识来计算人造测量数据记录。 然后使用每个记录系统的四分之一旋转的人造测量数据来计算具有高时间分辨率的最终CT图像。 该方法提供双能量扫描的使用，而不会损失双源系统中可用的高时间分辨率。

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：US20120213424A1

公开(公告)日：2012-08-23

申请号：US13401879

申请日：2012-02-22

申请人： Thomas Flohr ,  Martin Petersilka ,  Karl Stierstorfer

发明人： Thomas Flohr ,  Martin Petersilka ,  Karl Stierstorfer

IPC分类号： G06K9/00 ,  G06F7/60 ,  A61B6/03

CPC分类号： G01N23/046 ,  A61B6/032 ,  A61B6/06 ,  A61B6/4014 ,  A61B6/4291 ,  A61B6/5205 ,  A61B6/5282 ,  G01N2223/419 ,  G01N2223/612 ,  G06T11/005 ,  G06T2211/424

摘要： A method and a computer system are disclosed for scattered beam correction in a CT examination of an object in a multi source CT. In at least one embodiment, the method includes generating original projection data records; reconstruction of the object with the original projection data records of at least one detector; determining the scattered radiation generated by each emitter exclusively in the direction of the original beams of the at least one other emitter relative to its opposing detector; generating corrected projection data records by removing the calculated scattered radiation from the original projection data records; reconstruction of the object with the corrected projection data records, and implementing a further iteration of the method when determining the scattered radiation or issuing the reconstruction result if at least one predetermined abort criterion applies.

摘要翻译： 公开了一种用于在多源CT中的对象的CT检查中的散射束校正的方法和计算机系统。 在至少一个实施例中，该方法包括生成原始投影数据记录; 用至少一个检测器的原始投影数据记录重建对象; 确定由每个发射器产生的散射辐射源专用于至少一个其它发射器的原始光束相对于其相对的检测器的方向; 通过从原始投影数据记录中去除计算的散射辐射来产生校正的投影数据记录; 使用校正的投影数据记录重建对象，并且如果应用至少一个预定中止标准，则在确定散射辐射或发出重建结果时，执行该方法的进一步迭代。

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。

公开(公告)号：US20070025499A1

公开(公告)日：2007-02-01

申请号：US11491959

申请日：2006-07-25

申请人： Herbert Bruder ,  Thomas Flohr ,  Karl Schwarz ,  Karl Stierstorfer

发明人： Herbert Bruder ,  Thomas Flohr ,  Karl Schwarz ,  Karl Stierstorfer

IPC分类号： A61B6/00 ,  G01N23/00 ,  G21K1/12 ,  H05G1/60

CPC分类号： A61B6/4014 ,  A61B6/027 ,  A61B6/032 ,  A61B6/4085 ,  G01N2223/419

摘要： A method is disclosed for compiling computer tomographic representations using a CT system with at least two angularly offset ray sources. A first ray cone with a relatively larger fan angle and a second ray cone with a relatively smaller fan angle scan an object circularly or spirally. The first ray cone generates a first dataset A and the second ray cone generates a dataset B. The dataset B of the smaller ray cone is supplemented with other data at the edge to give an expanded dataset B+ for reconstruction of the CT representation. The expanded dataset B+ of the second, smaller ray cone and the dataset A of the first, larger ray cone is subjected to a convolution operation to give datasets B+′ and A′. Finally, a back projection to reconstruct sectional images or volume data is respectively carried out from the convoluted datasets B+′ and A′. The dataset B is supplemented with data of the dataset A and supplementary data are removed from the dataset B+′ after the convolution but before the back projection.

摘要翻译： 公开了一种使用具有至少两个角偏移射线源的CT系统来编译计算机断层图像表示的方法。 具有相对较大扇角的第一射线锥体和具有较小扇形角度的第二射线锥体圆形地或螺旋地扫描物体。 第一射线锥产生第一数据集A，第二射线锥生成数据集B.较小射线锥的数据集B在边缘被补充其他数据，以给出用于重建CT表示的扩展数据集B +。 将第二较小的光线锥体的扩展数据集B +和第一个较大的光线锥体的数据集A进行卷积运算，以给出数据集B +'和A'。 最后，从卷积数据集B +'和A'分别进行重建截面图像或体积数据的背投影。 数据集B补充数据集A的数据，并且在卷积之后但在反投影之前从数据集B +'中删除补充数据。

公开(公告)号：US20060280281A1

公开(公告)日：2006-12-14

申请号：US11451581

申请日：2006-06-13

申请人： Thomas Flohr ,  Michael Grasruck ,  Karl Stierstorfer

发明人： Thomas Flohr ,  Michael Grasruck ,  Karl Stierstorfer

IPC分类号： H05G1/60 ,  A61B6/00 ,  G01N23/00 ,  G21K1/12

CPC分类号： A61B6/482 ,  A61B6/4241 ,  A61B6/504 ,  A61B6/505

摘要： A method is disclosed for calculating absorber-specific weighting coefficients and a method is disclosed for improving a contrast-to-noise ratio, dependent on an absorber, in an x-ray image of an object to be examined produced by an x-ray machine. A weighted summation of detector output signals from different energy windows of an energy-selector detector are used to improve the contrast-to-noise ratio as a function of the absorber.

摘要翻译： 公开了一种用于计算吸收体特定加权系数的方法，并且公开了一种用于在X射线机产生的待检测物体的X射线图像中提高取决于吸收体的对比度噪声比的方法 。 使用来自能量选择器检测器的不同能量窗口的检测器输出信号的加权求和来提高作为吸收器的函数的对比噪声比。

公开(公告)号：US20050238136A1

公开(公告)日：2005-10-27

申请号：US11100445

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 ,  G01N23/00 ,  G01N23/04 ,  G01N23/06 ,  G21K1/12 ,  H05G1/08 ,  H05G1/60

CPC分类号： G06T11/005 ,  A61B6/027 ,  A61B6/032 ,  A61B6/4028 ,  A61B6/4085 ,  G01N23/046 ,  G01N2223/419

摘要： A method is for taking computed tomography scans with the aid of a CT unit and to a CT unit. An X-ray tube is moved in a circle or spiral about a z-axis in combination with a detector situated opposite and an object is scanned. The X-ray tube includes a jumping focus with two or more different jumping focal positions relative to the X-ray tube. Parallel data records are formed from the detector data obtained, and tomograms are reconstructed therefrom. When forming the parallel data records, account is taken of the different position of the respectively current jumping focus in relation to the X-ray tube (=jumping focal position) in the radial direction.

摘要翻译： 一种方法是借助于CT单元和CT单元进行计算机断层扫描。 X射线管与围绕z轴的圆形或螺旋形组合移动，与检测器相结合并且物体被扫描。 X射线管包括相对于X射线管具有两个或多个不同跳跃焦点位置的跳跃焦点。 从获得的检测器数据形成并行数据记录，并从其重构断层图像。 在形成并行数据记录时，考虑到相对于X射线管（=跳跃焦点位置）在径向上的分别当前跳跃焦点的不同位置。