公开(公告)号：US08180151B2

公开(公告)日：2012-05-15

申请号：US12213322

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 ,  G06T2200/24 ,  G06T2207/10072 ,  G06T2207/20096 ,  G06T2207/20104 ,  G06T2207/30004

Abstract: In the method according to at least one embodiment of the invention, a first segmentation of a structure in an image data record is firstly carried out, and a first final segmentation result is obtained therefrom. A region in the image data record is selected based on the first final segmentation result obtained. A first band is placed at a first, outwardly pointing distance from the selected region. This first band characterizes a background region. A second band is placed at a second, inwardly pointing distance from the projected first final segmentation result of the first segmentation. This second band characterizes a structure region. A further segmentation is carried out based on the characterized background region and the characterized structure region, and the final segmentation result of the further segmentation is saved and/or displayed. Furthermore, an image processing unit for carrying out the method is disclosed.

Abstract translation: 在根据本发明的至少一个实施例的方法中，首先执行图像数据记录中的结构的第一分割，并从其获得第一最终分割结果。 基于所获得的第一最终分割结果来选择图像数据记录中的区域。 第一条带放置在距选定区域的第一个向外指向的距离处。 这个第一个乐队描绘了一个背景区域。 第二条带放置在距离第一分割的投影的第一最终分割结果的第二，向内指向的距离处。 第二个频带表征了一个结构区域。 基于特征化背景区域和特征化结构区域进行进一步分割，并且保存和/或显示进一步分割的最终分割结果。 此外，公开了一种用于执行该方法的图像处理单元。

公开(公告)号：US08064674B2

公开(公告)日：2011-11-22

申请号：US12467614

申请日：2009-05-18

Applicant: Matthias Fenchel ,  Christophe Chefd'hotel

Inventor： Matthias Fenchel ,  Christophe Chefd'hotel

IPC: G06K9/62 ,  G06T7/00 ,  G06N5/02

CPC classification number: G06K9/6292 ,  G06T7/11 ,  G06T2207/10088

Abstract: Dixon methods in magnetic resonance imaging generate MRI images that may contain at least two tissue components such as fat and water. Dixon methods generate images containing both tissue components and predominantly one tissue component. A first segmentation of a first tissue component is generated in a T1 weighted image. The segmentation is correlated with at least a first and a second Dixon image. The image with the highest correlation is assigned the first tissue component.

Abstract translation: 磁共振成像中的Dixon方法产生可能含有至少两种组织成分如脂肪和水的MRI图像。 Dixon方法产生包含组织成分和主要是一个组织成分的图像。 在T1加权图像中产生第一组织分量的第一分割。 分割与至少第一和第二Dixon图像相关。 具有最高相关性的图像被分配第一组织分量。

公开(公告)号：US20100111390A1

公开(公告)日：2010-05-06

申请号：US12467614

申请日：2009-05-18

Applicant: Matthias Fenchel ,  Christophe Chefd'hotel

Inventor： Matthias Fenchel ,  Christophe Chefd'hotel

IPC: G06K9/62 ,  G06T7/00 ,  G06N5/02

CPC classification number: G06K9/6292 ,  G06T7/11 ,  G06T2207/10088

Abstract: Dixon methods in magnetic resonance imaging generate MRI images that may contain at least two tissue components such as fat and water. Dixon methods generate images containing both tissue components and predominantly one tissue component. A first segmentation of a first tissue component is generated in a T1 weighted image. The segmentation is correlated with at least a first and a second Dixon image. The image with the highest correlation is assigned the first tissue component.

Abstract translation: 磁共振成像中的Dixon方法产生可能含有至少两种组织成分如脂肪和水的MRI图像。 Dixon方法产生包含组织成分和主要是一个组织成分的图像。 在T1加权图像中产生第一组织分量的第一分割。 分割与至少第一和第二Dixon图像相关。 具有最高相关性的图像被分配第一组织分量。

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。