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1.发明申请METHOD AND MAGNETIC RESONANCE SYSTEM FOR IMAGING A PARTIAL REGION OF AN EXAMINATION SUBJECT 有权用于成像检查对象的部分区域的方法和磁共振系统公开(公告)号：US20130057282A1
公开(公告)日：2013-03-07
申请号：US13606398
申请日：2012-09-07
IPC分类号： G01R33/565 , G01R33/341
CPC分类号： G01R33/56563 , A61B5/055 , G01R33/481 , G01R33/56572
摘要： 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.
摘要翻译： 在一种方法和磁共振（MR）装置中，通过多层测量对检查对象的部分区域进行成像，该部分区域包括至少两个测量切片，并且至少部分地位于 对于磁共振设备的视图，对于要被优化的位于视场边缘的每个体素，配置用于待测量的部分区域的每个测量片并用于获取磁共振的梯度场 多层测量中的数据。 梯度场被配置为使得梯度场的非线性和B0场不均匀性在每个上述体素处被消除以在视场的边缘处的部分区域被优化。 从以这种方式获取的磁共振数据确定检查对象的部分区域的图像。
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2.发明授权公开(公告)号：US09753113B2
公开(公告)日：2017-09-05
申请号：US13606398
申请日：2012-09-07
IPC分类号： A61B5/055 , G01R33/565 , G01R33/48
CPC分类号： G01R33/56563 , A61B5/055 , G01R33/481 , G01R33/56572
摘要： 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.
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3.发明申请公开(公告)号：US20110187364A1
公开(公告)日：2011-08-04
申请号：US13015065
申请日：2011-01-27
IPC分类号： G01R33/48
CPC分类号： G01R33/481 , G01R33/56563
摘要： 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.
摘要翻译： 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。
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4.发明授权Method for calculating a value of an absorption parameter in positron emission tomography 有权用于计算正电子发射断层扫描中吸收参数值的方法公开(公告)号：US09220473B2
公开(公告)日：2015-12-29
申请号：US13747756
申请日：2013-01-23
CPC分类号： 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
摘要： 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.
摘要翻译： 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。
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5.发明申请Method For Imaging A Portion Of An Examination Object In A Magnetic Resonance Scanner 有权在磁共振扫描仪中成像检查对象的一部分的方法公开(公告)号：US20120056621A1
公开(公告)日：2012-03-08
申请号：US13226022
申请日：2011-09-06
IPC分类号： G01R33/48
CPC分类号： G01R33/56563 , G01R33/445 , G01R33/481 , G01R33/56572
摘要： 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.
摘要翻译： 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。
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6.发明授权Method for performing combined magnetic resonance/positron emission tomography 有权执行组合磁共振/正电子发射断层扫描的方法公开(公告)号：US09445722B2
公开(公告)日：2016-09-20
申请号：US13792502
申请日：2013-03-11
CPC分类号： A61B5/0035 , A61B5/055 , A61B6/037 , A61B6/4417 , A61B6/5247 , G01R33/481 , G01R33/56563 , G01R33/56572
摘要： A method is disclosed for performing a combined magnetic resonance/positron emission tomography scan of an examination object in an MR/PET system. An embodiment of the method entails acquiring first magnetic resonance data using a first readout gradient field. The first readout gradient field is chosen such that, at a location of the field of view of the magnetic resonance system, a distortion caused by a nonlinearity of the first readout gradient field and a distortion caused by a B0 field inhomogeneity substantially cancel each other out. First magnetic resonance images for planning the combined magnetic resonance/positron emission tomography session and determining an attenuation correction map for a positron emission tomography scan are determined on the basis of the first magnetic resonance data. Positron emission data and second magnetic resonance data are acquired using a second readout gradient field.
摘要翻译： 公开了一种用于对MR / PET系统中的检查对象进行组合磁共振/正电子发射断层扫描的方法。 该方法的实施例需要使用第一读出梯度场获取第一磁共振数据。 选择第一读出梯度场，使得在磁共振系统的视场的位置处，由第一读出梯度场的非线性引起的失真和由B0场不均匀性引起的失真基本上彼此抵消 。 基于第一磁共振数据确定用于规划组合磁共振/正电子发射断层摄影会话的第一磁共振图像和确定正电子发射断层摄影扫描的衰减校正图。 使用第二读出梯度场获取正电子发射数据和第二磁共振数据。
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公开(公告)号：US08896307B2
公开(公告)日：2014-11-25
申请号：US13422434
申请日：2012-03-16
IPC分类号： G01R33/44 , G01R33/565 , G01R33/48
CPC分类号： G01R33/481 , G01R33/56563 , G01R33/56572
摘要： According to an embodiment of a method, a first readout gradient field is determined in such a way that a distortion caused by a non-linearity of the first readout gradient field and a distortion caused by a B0 field inhomogeneity are essentially cancelled at a first location of a field of view of the magnetic resonance facility. Moreover, a second readout gradient field is determined in such a way that a distortion caused by a non-linearity of the second readout gradient field and a distortion caused by a B0 field inhomogeneity are essentially cancelled at a different second location of the field of view. Finally, a multiecho sequence is performed, wherein first magnetic resonance data is captured using the first readout gradient field after a 180° pulse and second magnetic resonance data is captured using the second readout gradient field after a further 180° pulse.
摘要翻译： 根据方法的实施例，第一读出梯度场被确定为使得由第一读出梯度场的非线性引起的失真和由B0场不均匀性引起的失真在第一位置处被基本上消除 的磁共振设备的视场。 此外，以这样的方式确定第二读出梯度场，使得由第二读出梯度场的非线性引起的失真和由B0场不均匀性引起的失真在视场的不同的第二位置基本上消除 。 最后，执行多电路序列，其中在180°脉冲之后使用第一读出梯度场捕获第一磁共振数据，并且在进一步180°脉冲之后使用第二读出梯度场捕获第二磁共振数据。
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8.发明授权Method for imaging a portion of an examination object in a magnetic resonance scanner 有权在磁共振扫描仪中成像检查对象的一部分的方法公开(公告)号：US08810243B2
公开(公告)日：2014-08-19
申请号：US13226022
申请日：2011-09-06
IPC分类号： G01V3/00
CPC分类号： G01R33/56563 , G01R33/445 , G01R33/481 , G01R33/56572
摘要： 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.
摘要翻译： 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。
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公开(公告)号：US20120235680A1
公开(公告)日：2012-09-20
申请号：US13422434
申请日：2012-03-16
IPC分类号： G01R33/44
CPC分类号： G01R33/481 , G01R33/56563 , G01R33/56572
摘要： According to an embodiment of a method, a first readout gradient field is determined in such a way that a distortion caused by a non-linearity of the first readout gradient field and a distortion caused by a B0 field inhomogeneity are essentially cancelled at a first location of a field of view of the magnetic resonance facility. Moreover, a second readout gradient field is determined in such a way that a distortion caused by a non-linearity of the second readout gradient field and a distortion caused by a B0 field inhomogeneity are essentially cancelled at a different second location of the field of view. Finally, a multiecho sequence is performed, wherein first magnetic resonance data is captured using the first readout gradient field after a 180° pulse and second magnetic resonance data is captured using the second readout gradient field after a further 180° pulse.
摘要翻译： 根据方法的实施例，第一读出梯度场被确定为使得由第一读出梯度场的非线性引起的失真和由B0场不均匀性引起的失真在第一位置处被基本上消除 的磁共振设备的视场。 此外，以这样的方式确定第二读出梯度场，使得由第二读出梯度场的非线性引起的失真和由B0场不均匀性引起的失真在视场的不同的第二位置基本上消除 。 最后，执行多电路序列，其中在180°脉冲之后使用第一读出梯度场捕获第一磁共振数据，并且在进一步180°脉冲之后使用第二读出梯度场捕获第二磁共振数据。
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10.发明授权公开(公告)号：US08648595B2
公开(公告)日：2014-02-11
申请号：US13015065
申请日：2011-01-27
IPC分类号： G01V3/00
CPC分类号： G01R33/481 , G01R33/56563
摘要： 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.
摘要翻译： 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。
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