公开(公告)号：US20120249141A1

公开(公告)日：2012-10-04

申请号：US13433972

申请日：2012-03-29

Applicant: Jan Ole Blumhagen ,  Matthias Fenchel ,  Ralf Ladebeck

Inventor： Jan Ole Blumhagen ,  Matthias Fenchel ,  Ralf Ladebeck

IPC: G01R33/565 ,  G01R33/34

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

Abstract: A method is disclosed for correcting a distortion in a magnetic resonance recording. A distortion indicates a mismatch between a distorted position of an image point in the magnetic resonance recording and an actual position of the image point. According to at least one embodiment of the method, a B0 field deviation and a gradient field deviation are determined for at least one actual position in the magnetic resonance facility. Furthermore, a magnetic resonance recording of an examination object is captured and the actual position of an image point of the magnetic resonance recording is determined as a function of the distorted position of the image point in the magnetic resonance recording, the B0 field deviation at the actual position and the gradient field deviation at the actual position.

Abstract translation: 公开了一种用于校正磁共振记录中的失真的方法。 失真表示磁共振记录中的图像点的失真位置与图像点的实际位置之间的失配。 根据该方法的至少一个实施例，为磁共振设备中​​的至少一个实际位置确定B0场偏移和梯度场偏差。 此外，拍摄检查对象的磁共振记录，并且磁共振记录的图像点的实际位置被确定为磁共振记录中的图像点的失真位置的函数，则在 实际位置和实际位置的梯度场偏差。

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：US09220473B2

公开(公告)日：2015-12-29

申请号：US13747756

申请日：2013-01-23

Applicant: Jan Ole Blumhagen ,  Matthias Fenchel ,  Ralf Ladebeck

Inventor： Jan Ole Blumhagen ,  Matthias Fenchel ,  Ralf Ladebeck

IPC: A61B5/05 ,  A61B6/00 ,  A61B5/00 ,  A61B6/03 ,  A61B5/055 ,  G01R33/48

CPC classification number: A61B6/5247 ,  A61B5/0035 ,  A61B5/0037 ,  A61B5/055 ,  A61B5/0555 ,  A61B5/4872 ,  A61B5/4875 ,  A61B5/72 ,  A61B6/037 ,  A61B6/4417 ,  A61B6/463 ,  A61B6/466 ,  A61B6/5217 ,  G01R33/481

Abstract: A method is disclosed for calculating a spatially resolved value of an absorption parameter for a positron emission tomography (PET) scan of an examination object via magnetic resonance tomography (MRT). Magnetic resonance data is acquired within a first region lying within a field of view of a magnetic resonance system and within a second region bordering on the first and lying at the edge of the field of view. The method includes the spatially resolved calculation of a first value of the absorption parameter from the first MR data within the first region and of a second value from the second MR data within the second region. A three-dimensional parameter map is obtained from the first value. This parameter map is extended by the second value such that within the first region and the second region the parameter map has the value of the absorption parameter in spatially resolved form.

Abstract translation: 公开了一种用于通过磁共振断层摄影（MRT）计算检查对象的正电子发射断层摄影（PET）扫描的吸收参数的空间分辨值的方法。 磁共振数据在位于磁共振系统的视野内的第一区域内并且在与第一区域接合并位于视野边缘的第二区域内获取。 该方法包括从第一区域内的第一MR数据和第二区域内的第二MR数据的第二值的空间分辨计算吸收参数的第一值。 从第一个值获得三维参数图。 该参数图被扩展第二值，使得在第一区域和第二区域内参数图具有空间分辨形式的吸收参数的值。

公开(公告)号：US20140153806A1

公开(公告)日：2014-06-05

申请号：US14091372

申请日：2013-11-27

Applicant: Christopher Glielmi ,  Christian Geppert ,  David Faul ,  Matthias Fenchel

Inventor： Christopher Glielmi ,  Christian Geppert ,  David Faul ,  Matthias Fenchel

IPC: G01R33/48 ,  A61B6/03 ,  A61B5/055 ,  G06T7/00 ,  G06T7/20

CPC classification number: G01R33/481 ,  A61B5/0035 ,  A61B5/0037 ,  A61B5/055 ,  A61B6/037 ,  A61B6/4417 ,  A61B6/5247 ,  A61B6/5258 ,  A61B2576/00 ,  G06T5/008 ,  G06T5/50 ,  G06T2207/10088 ,  G06T2207/10104

Abstract: A method of attenuation correction for a positron emission tomography (PET) system includes obtaining PET scan data representative of a volume scanned by the PET system, obtaining a plurality of magnetic resonance (MR) scan data sets representative of the volume, each MR scan data set being acquired in a respective time period during acquisition of the PET scan data by the PET system, detecting motion of the volume that occurred during the acquisition of the PET scan data based on an assessment of the plurality of MR scan data sets, the PET scan data, or the plurality of MR scan data sets and the PET scan data, determining attenuation correction data from the plurality of MR scan data sets based on the detected motion for alignment of the attenuation correction data and the PET scan data, and correcting the PET scan data with the attenuation correction data.

Abstract translation: 用于正电子发射断层摄影（PET）系统的衰减校正方法包括获得代表由PET系统扫描的体积的PET扫描数据，获得表示体积的多个磁共振（MR）扫描数据集，每个MR扫描数据 通过PET系统在PET扫描数据的采集期间在各自的时间段中进行采集，基于多个MR扫描数据集的评估来检测在PET扫描数据的采集期间发生的体积的运动，PET 扫描数据或多个MR扫描数据组和PET扫描数据，基于检测到的用于对准衰减校正数据和PET扫描数据的运动来确定来自多个MR扫描数据组的衰减校正数据，并校正 PET扫描数据与衰减校正数据。

公开(公告)号：US08618490B2

公开(公告)日：2013-12-31

申请号：US13160616

申请日：2011-06-15

Applicant: Matthias Fenchel ,  Ralf Ladebeck

Inventor： Matthias Fenchel ,  Ralf Ladebeck

IPC: G01T1/166 ,  A61B5/05

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：US20120268118A1

公开(公告)日：2012-10-25

申请号：US13445333

申请日：2012-04-12

Applicant: Matthias Fenchel ,  Kirstin Jattke

Inventor： Matthias Fenchel ,  Kirstin Jattke

IPC: G01R33/56

CPC classification number: A61B5/055 ,  A61B5/0035 ,  A61B6/03 ,  A61B6/4417 ,  A61B6/5247 ,  G01R33/481 ,  G01R33/5608

Abstract: MR image data relating to a volume section of an examination object is determined. Image data relating to this volume section is also captured by way of a true-to-original tomographic method. The MR image data is compared with the image data. Depending on the results of this comparison, either the MR image data is corrected such that the MR image data matches the image data as closely as possible, or parameters that are used during the capture of the MR image data are modified such that, when the MR image data of the predefined volume section is captured again using the modified parameters, the newly captured MR image data matches the image data as closely as possible.

Abstract translation: 确定与检查对象的体积部分相关的MR图像数据。 与该体积部分相关的图像数据也通过真实到原始的断层摄影方法来捕获。 将MR图像数据与图像数据进行比较。 根据该比较的结果，校正MR图像数据，使得MR图像数据尽可能接近匹配图像数据，或者在拍摄MR图像数据期间使用的参数被修改，使得当 使用修改的参数再次捕获预定义卷部分的MR图像数据，新捕获的MR图像数据尽可能接近匹配图像数据。

公开(公告)号：US20120056621A1

公开(公告)日：2012-03-08

申请号：US13226022

申请日：2011-09-06

Applicant: Jan Ole Blumhagen ,  Matthias Fenchel ,  Ralf Ladebeck

Inventor： Jan Ole Blumhagen ,  Matthias Fenchel ,  Ralf Ladebeck

IPC: G01R33/48

CPC classification number: G01R33/56563 ,  G01R33/445 ,  G01R33/481 ,  G01R33/56572

Abstract: A method is disclosed for imaging a portion of an examination object in a magnetic resonance scanner. The portion is arranged at the edge of a field of view of the magnetic resonance scanner. During at least one embodiment of the method, a gradient field is produced such that a nonlinearity in the gradient field and a B0-field inhomogeneity cancel at a predetermined point at the edge of the field of view. Magnetic resonance data, which contains the predetermined point at the edge of the field of view, is acquired with the aid of the gradient field. An image of the portion of the examination object at the predetermined point is determined from the magnetic resonance data.

Abstract translation: 公开了一种用于对磁共振扫描仪中的检查对象的一部分进行成像的方法。 该部分布置在磁共振扫描仪的视野的边缘。 在该方法的至少一个实施例中，产生梯度场，使得梯度场中的非线性和B0场不均匀性在视场边缘处的预定点处消除。 借助于梯度场获取包含视场边缘处的预定点的磁共振数据。 根据磁共振数据确定检查对象在预定点处的部分的图像。

公开(公告)号：US20120010495A1

公开(公告)日：2012-01-12

申请号：US13176010

申请日：2011-07-05

Applicant: Andre de Oliveira ,  Matthias Fenchel ,  Wilhelm Horger

Inventor： Andre de Oliveira ,  Matthias Fenchel ,  Wilhelm Horger

IPC: A61B5/055

CPC classification number: G01R33/5608 ,  A61B5/055 ,  A61B5/201 ,  A61B5/4064 ,  A61B5/4244 ,  A61B5/4381 ,  G01R33/543

Abstract: An embodiment of the invention relates to the generation of MR images of a volume section within an examination object by way of a magnetic resonance scanner. In at least one embodiment, the following steps are performed: generating at least one of the MR images; automatically performing a number of quality inspections on the at least one MR image; and, should one of these quality inspections fail, an action is automatically performed in order to improve a quality when generating more of the MR images.

Abstract translation: 本发明的实施例涉及通过磁共振扫描仪生成检查对象内的体积部分的MR图像。 在至少一个实施例中，执行以下步骤：产生MR图像中的至少一个; 在所述至少一个MR图像上自动执行多个质量检查; 并且如果这些质量检查之一失败，则自动执行动作以便在生成更多的MR图像时提高质量。