公开(公告)号：US5654995A

公开(公告)日：1997-08-05

申请号：US424060

申请日：1995-04-19

申请人： Thomas Flohr

发明人： Thomas Flohr

IPC分类号： G01N23/06 ,  A61B6/03 ,  G01N23/00

CPC分类号： A61B6/032 ,  A61B6/4028 ,  Y10S378/901

摘要： An x-ray computed tomography apparatus is operated so that a reconstruction of arbitrarily selectable volume regions can be accomplished. A Fourier reconstruction is implemented based on parallel data in planes that are inclined by the angle .phi. relative to a plane perpendicular to the z axis.

摘要翻译： 操作X射线计算机断层摄影装置，使得可以实现任意选择的体积区域的重建。 基于相对于垂直于z轴的平面通过角度phi倾斜的平面中的平行数据来实现傅里叶重建。

公开(公告)号：US09498177B2

公开(公告)日：2016-11-22

申请号：US12729272

申请日：2010-03-23

申请人： Herbert Bruder ,  Thomas Flohr ,  Rainer Raupach ,  Martin Sedlmair ,  Heinrich Wallschlager

发明人： Herbert Bruder ,  Thomas Flohr ,  Rainer Raupach ,  Martin Sedlmair ,  Heinrich Wallschlager

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

CPC分类号： A61B6/481 ,  A61B6/032 ,  A61B6/4014 ,  A61B6/4441 ,  A61B6/482 ,  A61B6/503 ,  A61B6/504 ,  A61B6/507 ,  A61B6/541 ,  G06T11/006 ,  G06T2211/424

摘要： A method is disclosed for reconstructing image data of an examination object from measured data, the measured data being captured during a rotating movement of a radiation source of a computed tomography system around the examination object. In at least one embodiment, different iteration images of the examination object are determined successively from the measured data by way of an iterative algorithm, wherein with the iterative algorithm the current iteration image at any one time is high-pass-filtered and weighted as a function of contrast using a variable which contains contrast information relating to the current iteration image at that time.

摘要翻译： 公开了一种用于从测量数据重建检查对象的图像数据的方法，所测量的数据在计算机断层扫描系统的辐射源围绕检查对象的旋转运动期间被捕获。 在至少一个实施例中，通过迭代算法从测量数据连续地确定检查对象的不同迭代图像，其中利用迭代算法，任何时间的当前迭代图像被高通滤波并加权为 使用包含与当时的当前迭代图像有关的对比度信息的变量的对比度的功能。

公开(公告)号：US20160300368A1

公开(公告)日：2016-10-13

申请号：US15091658

申请日：2016-04-06

申请人： Thomas Flohr ,  Steffen Kappler ,  Rainer Raupach ,  Harald Schöndube

发明人： Thomas Flohr ,  Steffen Kappler ,  Rainer Raupach ,  Harald Schöndube

IPC分类号： G06T11/00 ,  G06T5/00 ,  G06F19/00

CPC分类号： G06T11/005 ,  G06F19/00 ,  G06F19/321 ,  G06T11/006 ,  G06T2211/421 ,  G06T2211/424

摘要： A method for reconstructing image data during CT imaging is described. In the method, a plurality of independent data records of projection measured data are captured. A combined data record is then determined based on the captured data records. In addition, morphological information is determined based on the combined data record. A target data record is also determined based on the captured independent data records. A target image data record is reconstructed based on the target data record and the determined morphological information. An image data determination facility and a computed tomography system are also described.

摘要翻译： 描述了在CT成像期间重建图像数据的方法。 在该方法中，捕获投影测量数据的多个独立数据记录。 然后，基于捕获的数据记录来确定组合的数据记录。 另外，基于组合的数据记录来确定形态信息。 目标数据记录也是基于所捕获的独立数据记录来确定的。 基于目标数据记录和确定的形态信息来重构目标图像数据记录。 还描述了图像数据确定装置和计算机断层摄影系统。

公开(公告)号：US09204847B2

公开(公告)日：2015-12-08

申请号：US13372936

申请日：2012-02-14

申请人： Thomas Flohr ,  Bernhard Schmidt

发明人： Thomas Flohr ,  Bernhard Schmidt

IPC分类号： A61B6/00 ,  G06T5/50 ,  A61B6/03

CPC分类号： A61B6/4014 ,  A61B6/032 ,  A61B6/482 ,  A61B6/5258 ,  G06T5/50 ,  G06T2207/10081 ,  G06T2207/10116 ,  G06T2207/20224

摘要： A method and an image data record processing facility are disclosed for correcting image data of an examination object, which includes a first image data record obtained using a first X-ray energy and a second image data record obtained using a second X-ray energy. In this process, a corrected image data record is generated by subtracting from image point values at certain image point positions of the first image data record, image point values, which are assigned to the corresponding image point positions in the second image data record, multiplied by a weighting factor. The weighting factor here is selected as a function of the first X-ray energy used and the second X-ray energy used so that on subtraction a calcium component is removed from the image point values. A method for generating image data and an X-ray system having such an image data record processing facility are also described.

摘要翻译： 公开了一种用于校正检查对象的图像数据的方法和图像数据记录处理设备，其包括使用第一X射线能量获得的第一图像数据记录和使用第二X射线能量获得的第二图像数据记录。 在该处理中，通过从第一图像数据记录的某些图像点位置的图像点值中减去分配给第二图像数据记录中的相应图像点位置的图像点值，生成经校正的图像数据记录， 通过加权因子。 这里的加权因子被选择为所使用的第一X射线能量和所使用的第二X射线能量的函数，使得在减去时，从图像点值去除钙成分。 还描述了一种用于产生图像数据的方法和具有这种图像数据记录处理设备的X射线系统。

公开(公告)号：US08897530B2

公开(公告)日：2014-11-25

申请号：US13433989

申请日：2012-03-29

申请人： Thomas Flohr ,  Bernhard Schmidt ,  Martin Sedlmair ,  Marcus Wagner

发明人： Thomas Flohr ,  Bernhard Schmidt ,  Martin Sedlmair ,  Marcus Wagner

IPC分类号： G06T7/00 ,  A61B6/12 ,  A61B6/00 ,  G06T7/60

CPC分类号： A61B6/481 ,  A61B6/12 ,  A61B6/482 ,  A61B6/5217 ,  G06T7/11 ,  G06T7/136 ,  G06T7/174 ,  G06T7/62 ,  G06T2207/10116 ,  G06T2207/10152 ,  G06T2207/30096

摘要： An image processing device and method are disclosed for determining a proportion of necrotic tissue in a defined tissue area of an object under examination based on a high-energy image dataset and a low-energy image dataset, each recorded by way of x-ray measurements with different x-ray energies after a contrast medium has been applied to the object under examination. In at least one embodiment of the method, a virtual contrast medium image is determined from the high-energy image dataset and the low-energy image dataset and a segmentation image dataset is created, by the area of tissue being segmented. The segmentation result is transferred into the virtual contrast medium image for segmenting the tissue area in the virtual contrast medium image. Finally an analysis of values of the pixels lying in the segmented area is undertaken for identifying pixels which are to be assigned to necrotic tissue.

摘要翻译： 公开了一种图像处理装置和方法，用于基于高能量图像数据集和低能量图像数据集来确定被检查物体的确定的组织区域中的坏死组织的比例，每个图像数据集和低能量图像数据集通过x射线测量记录 在将造影剂应用于被检查物体之后，具有不同的x射线能量。 在该方法的至少一个实施例中，通过被分割的组织区域，从高能量图像数据集和低能量图像数据集确定虚拟造影剂图像，并且创建分割图像数据集。 将分割结果转移到虚拟造影剂图像中，以分割虚拟造影剂图像中的组织区域。 最后，分析位于分割区域中的像素的值，以识别将被分配给坏死组织的像素。

公开(公告)号：US08744161B2

公开(公告)日：2014-06-03

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

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：US08712006B2

公开(公告)日：2014-04-29

申请号：US13249483

申请日：2011-09-30

申请人： Thomas Allmendinger ,  Thomas Flohr

发明人： Thomas Allmendinger ,  Thomas Flohr

IPC分类号： A61B6/03

CPC分类号： A61B6/03 ,  A61B6/027 ,  A61B6/032 ,  A61B6/4014 ,  A61B6/4241 ,  A61B6/482 ,  A61B6/503 ,  A61B6/5205 ,  A61B6/541 ,  G06T11/005 ,  G06T2211/412

摘要： An embodiment of the invention relates to a method and to a CT device for computer tomographic spiral scanning of a patient in the region of a moving organ, in particular a beating heart, wherein a pitch is adjusted which is less than the maximum pitch, with which 180° image data can still be reconstructed. In at least one embodiment, during the scan the evaluated detector data with respect to its z width and position on the at least one irradiated detector are restricted as a function of the projection angle in such a way that an effective virtual detector with smaller z width and with a z speed profile, which differs from the z speed profile of the real detector, is produced respectively, and the moving organ is reconstructed on the basis of the detector data of the at least one virtual detector.

摘要翻译： 本发明的一个实施例涉及一种用于运动器官区域中的患者的计算机断层扫描螺旋扫描的方法和CT装置，特别是跳动心脏，其中调节小于最大间距的音调， 仍然可以重建180°图像数据。 在至少一个实施例中，在扫描期间，评估的检测器数据相对于其z宽度和至少一个被照射的检测器上的位置被限制为投影角的函数，使得具有较小z宽度的有效虚拟检测器 并且分别产生与实际检测器的z速度分布不同的az速度分布，并且基于至少一个虚拟检测器的检测器数据重建运动器官。

公开(公告)号：US08588493B2

公开(公告)日：2013-11-19

申请号：US12849082

申请日：2010-08-03

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

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

IPC分类号： G06K9/00

CPC分类号： A61B6/032 ,  A61B5/0456 ,  A61B6/4014 ,  A61B6/482 ,  A61B6/503 ,  A61B6/507 ,  G06T11/006 ,  G06T2211/412 ,  G06T2211/424 ,  G06T2211/436

摘要： A method is disclosed for reconstructing image data of a moving examination object from measurement data, wherein the measurement data was captured in the course of a relative rotational movement between a radiation source of a computed tomography system and the examination object. In at least one embodiment of the method, a first image of the examination object is calculated from a complete measurement data record of the measurement data for an image reconstruction and a second image of the examination object is calculated from an incomplete measurement data record of the measurement data for an image reconstruction. Frequency splitting of the first and second images takes place respectively in at least one low-frequency and one higher-frequency component and the image data of the second image is supplemented in the low-frequency component with image data of the low-frequency component of the first image. In a further processing step the second image thus supplemented is improved using the first image, in that errors due to the incompleteness of the measurement data record of the second image are reduced.

摘要翻译： 公开了一种用于从测量数据重建运动检查对象的图像数据的方法，其中在计算机断层摄影系统的辐射源和检查对象之间的相对旋转运动的过程中捕获测量数据。 在该方法的至少一个实施例中，根据用于图像重构的测量数据的完整测量数据记录来计算检查对象的第一图像，并且从不完整的测量数据记录计算检查对象的第二图像 用于图像重建的测量数据。 第一和第二图像的频率分割分别发生在至少一个低频和一个较高频分量中，并且第二图像的图像数据在低频分量中被补充，低频分量的图像数据是 第一张图片。 在另外的处理步骤中，使用第一图像来改善如此补充的第二图像，因为减少了由于第二图像的测量数据记录的不完备性造成的错误。

公开(公告)号：US08447009B2

公开(公告)日：2013-05-21

申请号：US13182616

申请日：2011-07-14

申请人： Thomas Flohr ,  Michael Grasruck ,  Bernhard Schmidt ,  Martin Sedlmair

发明人： Thomas Flohr ,  Michael Grasruck ,  Bernhard Schmidt ,  Martin Sedlmair

IPC分类号： A61B6/00 ,  G06K9/00

CPC分类号： A61B6/504 ,  A61B6/027 ,  A61B6/032 ,  A61B6/4021 ,  A61B6/4035 ,  A61B6/405 ,  A61B6/4241 ,  A61B6/482 ,  A61B6/507

摘要： A method and a computed tomography scanner are disclosed for carrying out an angiographic examination of a patient, wherein the utilized computed tomography scanner includes at least one recording system mounted on a gantry such that it can rotate about a z-axis. Projection data is acquired from at least one prescribed angular position of the gantry for at least two different energies of X-ray radiation. The projection data is subsequently combined to form a resulting projection image by evaluating the projection data corresponding to the respective angular position, in which projection image at least one substance, which should be displayed selectively, is imaged with a high image contrast compared to the respective individual projection data. This procedure extends the field of application of the computed tomography scanner to projection-based angiography examinations, which were previously restricted to C-arm systems. 3D image reconstruction methods and projection methods can be carried out on opposite sides and with great flexibility during an examination, without the need for an additional modality. By using a multispectral technique, it is possible to contrast agent. The projection data at dispense with recording a native projection data record without the different energies are moreover acquired with no or little time offset, and so a computationally expensive and error-prone registration of the data records can be dispensed with.

摘要翻译： 公开了一种用于对患者进行血管造影检查的方法和计算机断层摄影扫描器，其中所使用的计算机断层摄影扫描器包括安装在台架上的至少一个记录系统，使得其可围绕z轴旋转。 对于X射线辐射的至少两种不同能量，从台架的至少一个规定的角位置获取投影数据。 随后组合投影数据以通过评估对应于相应角位置的投影数据来形成所得到的投影图像，其中投影图像中应显示有选择地显示的至少一种物质与相应的角位置相比具有高图像对比度 个人投影数据。 该过程将计算机断层扫描仪的应用领域扩展到基于投影的血管造影检查，以前仅限于C臂系统。 3D图像重建方法和投影方法可以在对面进行，在检查过程中具有很大的灵活性，而不需要额外的模式。 通过使用多光谱技术，可以对比剂。 此外，在没有或几乎没有时间偏移的情况下获取没有不同能量记录原始投影数据记录的投影数据，因此可以省去数据记录的计算上昂贵且容易出错的注册。

公开(公告)号：US08442293B2

公开(公告)日：2013-05-14

申请号：US13018724

申请日：2011-02-01

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

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

IPC分类号： G06K9/00 ,  A61B6/00

CPC分类号： A61B6/4014 ,  A61B6/027 ,  A61B6/032 ,  A61B6/4441 ,  A61B6/482 ,  A61B6/507 ,  G01N23/046 ,  G01N2223/401 ,  G01N2223/419 ,  G01N2223/612 ,  G06T11/006 ,  G06T2211/432

摘要： A method is disclosed for reconstructing image data of an examination subject from measured data, wherein the measured data was acquired in the course of a relative rotational movement between a radiation source of a computed tomography system and the examination subject. A limited area between the radiation source and a detector represents a field of view in respect of which measured data can be acquired, and parts of the examination subject were located at least temporarily outside the field of view in the course of the measured data acquisition. In at least one embodiment, first image data is reconstructed from the measured data, and a boundary of the examination subject is determined with the aid of the first image data. The first image data is subsequently modified using the determined boundary, and projection data is calculated from the modified first image data. The measured data is modified using the projection data, and finally second image data is reconstructed from the modified measured data.

摘要翻译： 公开了一种用于从测量数据重建检查对象的图像数据的方法，其中在计算机断层摄影系统的辐射源与检查对象之间的相对旋转运动的过程中获取测量数据。 辐射源和检测器之间的有限区域表示可以获取测量数据的视野，并且在测量数据采集的过程中检查对象的部分至少临时定位在视场外。 在至少一个实施例中，从测量数据重建第一图像数据，借助于第一图像数据确定检查对象的边界。 随后使用所确定的边界修改第一图像数据，并且从修改的第一图像数据计算投影数据。 使用投影数据修改测量数据，最后从修改的测量数据重建第二图像数据。