公开(公告)号：US20110080168A1

公开(公告)日：2011-04-07

申请号：US12893140

申请日：2010-09-29

Applicant: Matthias Fenchel ,  Stefan Popescu

Inventor： Matthias Fenchel ,  Stefan Popescu

IPC: G01R33/48

CPC classification number: G01R33/481 ,  A61B6/037 ,  A61B6/4417 ,  A61B6/5247

Abstract: A method is disclosed for correction of truncations of an image of an object under examination in the reconstruction of image data from raw data which has been recorded with a magnetic resonance system from a field of view of the magnetic resonance system, with an object under examination which is located in the field of view of the magnetic resonance system being imaged in the raw data, and with the image recorded by the raw data of the object under examination being truncated at the edge of the field of view if at least one part of the object under examination is located outside the field of view. In at least one embodiment, the method includes determining a number of one-dimensional projections of the imaged field of view in the Radon space from the recorded raw data in order to obtain a projection profile of the image object under examination over the field of view in each case; checking each projection profile for whether the projection profile exhibits a truncation which is caused by the at least one part of the object under examination being located outside the field of view; if the respective checked projection profile exhibits a truncation, expanding the projection profile for correcting the truncation in that the projection profile is extrapolated in accordance with a predetermined extrapolation model in the area in which it exhibits the truncation; and reconstructing image data based on the expanded projection profiles in which the truncation of the image of the object under examination is corrected.

Abstract translation: 公开了一种用于在从磁共振系统的视野记录的原始数据重建图像数据的重建中校正检查对象的截断的方法，其中检查对象 其位于在原始数据中被成像的磁共振系统的视场中，并且由被检查对象的原始数据记录的图像在视场的边缘被截断，如果至少一部分 被检查对象位于视野外。 在至少一个实施例中，该方法包括从记录的原始数据确定Radon空间中的成像视场的一维投影的数量，以便在视场中获得被检查的图像对象的投影轮廓 在每种情况下 检查每个投影轮廓以确定投影轮廓是否显示由被检查物体的至少一部分位于视场之外引起的截断; 如果相应的检查的投影轮廓呈现截断，则扩展用于校正截断的投影轮廓，因为根据在其展现截断的区域中的预定外推模型外推投影轮廓; 以及基于扩大的投影轮廓重建图像数据，其中校正被检查物体的图像的截断。

公开(公告)号：US09753113B2

公开(公告)日：2017-09-05

申请号：US13606398

申请日：2012-09-07

Applicant: Jan Ole Blumhagen ,  Matthias Fenchel ,  Ralf Ladebeck

Inventor： Jan Ole Blumhagen ,  Matthias Fenchel ,  Ralf Ladebeck

IPC: A61B5/055 ,  G01R33/565 ,  G01R33/48

CPC classification number: G01R33/56563 ,  A61B5/055 ,  G01R33/481 ,  G01R33/56572

Abstract: In a method and magnetic resonance (MR) apparatus to image a partial region of an examination subject by means of a multislice measurement, which partial region includes at least two measurement slices, and is located at least in part at the edge of a field of view of the magnetic resonance apparatus, for each voxel to be optimized that is located at the edge of the field of view, a gradient field is configured for each measurement slice of the partial region that is to be measured and is used to acquire magnetic resonance data in the multislice measurement. The gradient field is configured so as to cause a nonlinearity of the gradient field and a B0 field inhomogeneity to cancel at each of the aforementioned voxel to be optimized at the partial region at the edge of the field of view. An image of the partial region of the examination subject is determined from the magnetic resonance data acquired in this manner.

公开(公告)号：US08552387B2

公开(公告)日：2013-10-08

申请号：US13158727

申请日：2011-06-13

Applicant: Matthias Fenchel

Inventor： Matthias Fenchel

IPC: G01T1/166

CPC classification number: G01T1/2985 ,  A61B6/037

Abstract: In an embodiment, an initial segmentation of an examination object is fixed, wherein an attenuation coefficient is assigned to each segment of the segmentation. Raw radiation data about the examination object arranged in the positron emission tomography scanner is acquired, and a correction factor is determined for each pixel with the aid of an optimization method, in which the probability of the acquired raw radiation data is maximized taking into account the segmentation and the attenuation coefficients assigned to the segments. A statistical parameter of the correction factors is determined for each segment and the segmentation is corrected by subdividing a segment as a function of the statistical parameter determined for the segment. A segment correction factor is determined for each segment from the correction factors assigned to the segment and the attenuation coefficients assigned to the segments are corrected as a function of the segment correction factors.

Abstract translation: 在一个实施例中，检查对象的初始分割是固定的，其中衰减系数被分配给分割的每个分段。 获取关于布置在正电子发射断层摄影扫描仪中的检查对象的原始辐射数据，并且借助于优化方法来确定每个像素的校正因子，其中获取的原始辐射数据的概率考虑到 分割和分配给段的衰减系数。 针对每个段确定校正因子的统计参数，并且通过根据为该段确定的统计参数来细分段来校正分段。 根据分配给该段的校正因子为每个段确定段校正因子，并且分配给段的衰减系数作为段校正因子的函数被校正。

公开(公告)号：US08299438B2

公开(公告)日：2012-10-30

申请号：US12458575

申请日：2009-07-16

Applicant: Matthias Fenchel ,  Ralf Ladebeck ,  Christian J. Michel ,  Charles C. Watson

Inventor： Matthias Fenchel ,  Ralf Ladebeck ,  Christian J. Michel ,  Charles C. Watson

IPC: G06F17/10

CPC classification number: G01R33/481 ,  A61B6/037 ,  A61B6/5235 ,  A61B6/5247 ,  G01R33/5608 ,  G06T11/005

Abstract: Example embodiments are directed to a method of correcting attenuation in a magnetic resonance (MR) scanner and a positron emission tomography (PET) unit. The method includes acquiring PET sinogram data of an object within a field of view of the PET unit. The method further includes producing an attenuation map based on a maximum likelihood expectation maximization (MLEM) of a parameterized model instance and the PET sinogram data.

Abstract translation: 示例性实施例涉及一种校正磁共振（MR）扫描仪和正电子发射断层摄影（PET）单元中的衰减的方法。 该方法包括在PET单元的视野范围内获取物体的PET正弦图数据。 该方法还包括基于参数化模型实例的最大似然期望最大化（MLEM）和PET正弦图数据产生衰减图。

公开(公告)号：US08200015B2

公开(公告)日：2012-06-12

申请号：US12213328

申请日：2008-06-18

Applicant: Matthias Fenchel ,  Andreas Schilling ,  Stefan Thesen

Inventor： Matthias Fenchel ,  Andreas Schilling ,  Stefan Thesen

IPC: G06K9/34

CPC classification number: G06T7/174 ,  G06T7/11 ,  G06T7/12 ,  G06T2207/20092

Abstract: In the method according to at least one embodiment of the invention, an image data record having a structure to be segmented is first of all displayed by display equipment. Using an input apparatus, a segmentation algorithm to be used is selected from a group of different segmentation algorithms, including a contour-based segmentation algorithm, a region-based segmentation algorithm and manual segmentation, based on the local image contrast in a region to be segmented in the image data record. A region to be segmented in the image data record is marked, and the structure to be segmented in the marked region is segmented using the selected segmentation algorithm, and a segmentation result of the segmentation is displayed. This procedure (selecting a segmentation algorithm/marking a region/segmenting the region/displaying) is repeated until the structure to be segmented is completely segmented in the displayed image data record and a boundary line of the structure is produced as the final segmentation result. Lastly, the final segmentation result is saved and/or displayed. Furthermore, an image processing unit is disclosed for carrying out the method of at least one embodiment.

Abstract translation: 在根据本发明的至少一个实施例的方法中，具有待分割结构的图像数据记录首先由显示设备显示。 使用输入装置，从一组不同的分割算法中选择要使用的分割算法，包括基于轮廓的分割算法，基于区域的分割算法和手动分割，基于区域中的局部图像对比度 在图像数据记录中分段。 标记图像数据记录中要分割的区域，并使用所选择的分割算法对标记区域中要分割的结构进行分割，并显示分割的分割结果。 重复该过程（选择分割算法/标记区域/分割区域/显示），直到待分割的结构在显示的图像数据记录中被完全分割，并且生成结构的边界线作为最终分割结果。 最后，最终的分割结果被保存和/或显示。 此外，公开了一种用于执行至少一个实施例的方法的图像处理单元。

公开(公告)号：US08150122B2

公开(公告)日：2012-04-03

申请号：US12366765

申请日：2009-02-06

Applicant: Matthias Fenchel ,  Andreas Schilling ,  Stefan Thesen

Inventor： Matthias Fenchel ,  Andreas Schilling ,  Stefan Thesen

IPC: G06K9/00

CPC classification number: G06K9/20 ,  A61B5/055 ,  G06K2209/051 ,  G06T7/12 ,  G06T7/143 ,  G06T2207/10088 ,  G06T2207/20081 ,  G06T2207/30004

Abstract: In a method to control the acquisition and/or evaluation procedure of image data in medical examinations, in a previously acquired planning image data set entirely or partially covering a target volume, spatial information of the target volume is determined automatically using a statistical model of the target volume based on data about real anatomy. The acquisition and/or evaluation operation is controlled using the spatial information. A statistical model of at least one greyscale value distribution in the region of the surface of the target volume is used to calculate the location information.

Abstract translation: 在用于控制医学检查中的图像数据的获取和/或评估过程的方法中，在完全或部分覆盖目标体积的先前获取的计划图像数据集中，使用统计模型自动确定目标体积的空间信息， 基于有关真实解剖学数据的目标体积。 使用空间信息来控制采集和/或评估操作。 使用目标体积表面区域中至少一个灰度值分布的统计模型来计算位置信息。

公开(公告)号：US20110309251A1

公开(公告)日：2011-12-22

申请号：US13160616

申请日：2011-06-15

Applicant: Matthias Fenchel ,  Ralf Ladebeck

Inventor： Matthias Fenchel ,  Ralf Ladebeck

IPC: G01T1/164 ,  G01T1/20

CPC classification number: G01R33/481 ,  A61B6/037 ,  A61B6/4417 ,  A61B6/583 ,  G06T11/005

Abstract: A method is disclosed for determining radiation attenuation as a result of an object in a positron emission tomography scanner. In at least one embodiment, a phantom object is arranged in the positron emission tomography scanner during the method. First raw radiation data of the phantom object is acquired while the object is not arranged in the positron emission tomography scanner. A first image of the phantom object is calculated from the first raw radiation data. The object then is arranged in the positron emission tomography scanner (2) and preliminary radiation attenuation of the object is identified. Second raw radiation data of the phantom object is acquired while the object is arranged in the positron emission tomography scanner. A second image of the phantom object is calculated from the second raw radiation data taking into account the preliminary radiation attenuation. The radiation attenuation is determined on the basis of the first image and the second image.

Abstract translation: 公开了一种用于确定作为正电子发射断层摄影扫描仪中的物体的结果的辐射衰减的方法。 在至少一个实施例中，在该方法期间，在正电子发射断层摄影扫描器中布置幻影物体。 当物体未排列在正电子发射断层摄影扫描器中时，获取幻影物体的第一原始辐射数据。 从第一个原始辐射数据计算幻影物体的第一个图像。 物体然后被布置在正电子发射断层扫描仪（2）中，并且识别对象的初步辐射衰减。 当物体布置在正电子发射断层扫描仪中时，获取体模对象的第二原始辐射数据。 考虑到初步辐射衰减，从第二原始辐射数据计算幻影物体的第二图像。 基于第一图像和第二图像确定辐射衰减。

公开(公告)号：US20110187364A1

公开(公告)日：2011-08-04

申请号：US13015065

申请日：2011-01-27

Applicant: Jan Ole BLUMHAGEN ,  Matthias Fenchel ,  Ralf Ladebeck

Inventor： Jan Ole BLUMHAGEN ,  Matthias Fenchel ,  Ralf Ladebeck

IPC: G01R33/48

CPC classification number: G01R33/481 ,  G01R33/56563

Abstract: A method is disclosed for determining a location of a subarea of an area under examination in a magnetic resonance system. The subarea is arranged at the edge of a field-of-view of the magnetic resonance system. In at least one embodiment of the method, at least one slice position is determined for an MR image in which the B0 field at the edge of the MR image satisfies a homogeneity value. For the slice position determined an MR image is acquired which contains the subarea at the edge of the field-of-view and the location of the subarea of the object under examination is determined through the location of the subarea in the MR image.

Abstract translation: 公开了一种用于确定磁共振系统中被检查区域的子区域的位置的方法。 子区域布置在磁共振系统的视野的边缘。 在该方法的至少一个实施例中，为MR图像确定至少一个切片位置，其中MR图像边缘处的B0场满足均匀性值。 对于确定的切片位置，获取包含在视场边缘处的子区域的MR图像，并且通过MR图像中的子区域的位置来确定被检查对象的子区域的位置。

公开(公告)号：US20110015904A1

公开(公告)日：2011-01-20

申请号：US12458575

申请日：2009-07-16

Applicant: Matthias Fenchel ,  Ralf Ladebeck ,  Christian J. Michel ,  Charles C. Watson

Inventor： Matthias Fenchel ,  Ralf Ladebeck ,  Christian J. Michel ,  Charles C. Watson

IPC: G06F17/10

CPC classification number: G01R33/481 ,  A61B6/037 ,  A61B6/5235 ,  A61B6/5247 ,  G01R33/5608 ,  G06T11/005

Abstract: Example embodiments are directed to a method of correcting attenuation in a magnetic resonance (MR) scanner and a positron emission tomography (PET) unit. The method includes acquiring PET sinogram data of an object within a field of view of the PET unit. The method further includes producing an attenuation map based on a maximum likelihood expectation maximization (MLEM) of a parameterized model instance and the PET sinogram data.

Abstract translation: 示例性实施例涉及一种校正磁共振（MR）扫描仪和正电子发射断层摄影（PET）单元中的衰减的方法。 该方法包括在PET单元的视野范围内获取物体的PET正弦图数据。 该方法还包括基于参数化模型实例的最大似然期望最大化（MLEM）和PET正弦图数据产生衰减图。

公开(公告)号：US20100002921A1

公开(公告)日：2010-01-07

申请号：US12498535

申请日：2009-07-07

Applicant: Matthias Fenchel ,  Andreas Schilling ,  Stefan Thesen

Inventor： Matthias Fenchel ,  Andreas Schilling ,  Stefan Thesen

IPC: G06K9/00

CPC classification number: A61B5/055 ,  G01R33/54 ,  G01R33/543 ,  G06F19/00 ,  G06F19/321 ,  G06T7/0012 ,  G06T7/11 ,  G06T7/143 ,  G06T7/149 ,  G06T7/32 ,  G06T7/35 ,  G06T2207/10088 ,  G06T2207/20081 ,  G06T2207/20128 ,  G06T2207/30004 ,  G16H40/63

Abstract: In a medical image acquisition device, and a method for operating such a device, before acquiring a current planning image data set from a subject, a statistical atlas is generated that is a statistical compilation concerning at least one part of the human body, the statistical compilation including an average image data set electronically associated, in the statistical atlas, with association information that identifies anatomy of the human body represented by the statistical compilation. The statistical atlas is compiled from multiple planning image data sets acquired using a specific measurement protocol. After the current planning image data set is acquired, the stored average image data set is transformed into the current planning image data set, so that the association information associated with the average image data set are accurately also associated with the current planning image data set. A diagnostic image acquisition of the subject is then controlled using the association information that is now associated with the current planning image data set.

Abstract translation: 在医疗图像采集装置中，以及用于操作这种装置的方法，在从对象获取当前的规划图像数据集之前，生成统计图谱，其是关于人体的至少一部分的统计汇编，统计 编辑包括在统计图中以电子方式相关联的平均图像数据集，其具有标识由统计汇编表示的人体的解剖结构的关联信息。 统计图集是从使用特定测量协议获取的多个规划图像数据集编译出来的。 在获取当前规划图像数据集之后，将所存储的平均图像数据集变换为当前规划图像数据集，使得与平均图像数据集相关联的关联信息也准确地与当前规划图像数据集相关联。 然后使用现在与当前规划图像数据集相关联的关联信息来控制对象的诊断图像采集。