-
公开(公告)号：US20100278406A1
公开(公告)日：2010-11-04
申请号：US12626127
申请日：2009-11-25
IPC分类号： G06K9/00
CPC分类号： A61B6/03 , G01R33/481 , G06T11/005 , G06T2211/432
摘要： A method and an system are disclosed for reconstructing an emission tomography image in a combined MR (magnetic resonance) and emission tomography imaging system. In at least one embodiment, the method includes obtaining an MR image of a subject, the subject being clipped in the MR image; obtaining raw emission tomography scan data of the subject; determining a missing part of the subject clipped in the MR image; using information of the MR image and the determined missing part to obtain a final attenuation model of the subject; and reconstructing the emission tomography image using the raw data and the final attenuation model.
摘要翻译： 公开了用于在组合MR（磁共振）和发射断层摄影成像系统中重建发射断层摄影图像的方法和系统。 在至少一个实施例中，该方法包括：获得被摄体的MR图像，将被摄体剪切在MR图像中; 获得受试者的原始放射断层扫描数据; 确定在MR图像中剪切的被摄体的缺失部分; 使用MR图像和确定的缺失部分的信息来获得对象的最终衰减模型; 并使用原始数据和最终衰减模型重建发射断层摄影图像。
-
公开(公告)号：US08718232B2
公开(公告)日：2014-05-06
申请号：US12626127
申请日：2009-11-25
IPC分类号： A61B6/03
CPC分类号： A61B6/03 , G01R33/481 , G06T11/005 , G06T2211/432
摘要： A method and an system are disclosed for reconstructing an emission tomography image in a combined MR (magnetic resonance) and emission tomography imaging system. In at least one embodiment, the method includes obtaining an MR image of a subject, the subject being clipped in the MR image; obtaining raw emission tomography scan data of the subject; determining a missing part of the subject clipped in the MR image; using information of the MR image and the determined missing part to obtain a final attenuation model of the subject; and reconstructing the emission tomography image using the raw data and the final attenuation model.
摘要翻译： 公开了用于在组合MR（磁共振）和发射断层摄影成像系统中重建发射断层摄影图像的方法和系统。 在至少一个实施例中，该方法包括：获得被摄体的MR图像，将被摄体剪切在MR图像中; 获得受试者的原始放射断层扫描数据; 确定在MR图像中剪切的被摄体的缺失部分; 使用MR图像和确定的缺失部分的信息来获得对象的最终衰减模型; 并使用原始数据和最终衰减模型重建发射断层摄影图像。
-
3.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。
-
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。
-
5.发明授权公开(公告)号：US08814572B2
公开(公告)日：2014-08-26
申请号：US13206579
申请日：2011-08-10
申请人： Ludwig Eberler , Matthias Fenchel , Ralf Ladebeck
发明人： Ludwig Eberler , Matthias Fenchel , Ralf Ladebeck
IPC分类号： G09B23/28
CPC分类号： G01R33/58 , G01R33/481
摘要： A phantom, particularly for use in MR- or PET-based imaging methods, includes a hollow base body that delimits an interior volume, wherein the interior volume is subdivided into at least two volume portions by at least one separation element, and wherein the separation element or a section thereof consists of foam.
摘要翻译： 特别是用于基于MR或PET的成像方法的体模包括限定内部体积的中空基体，其中内部体积被至少一个分离元件细分成至少两个体积部分，并且其中分离 元件或其一部分由泡沫构成。
-
6.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。
-
7.发明授权Method for at least partly determining and/or adapting an attenuation map used for correcting attenuation of positron emission tomography image data sets in a combined magnetic resonance-positron emission tomography device 有权用于至少部分地确定和/或适应用于校正组合的磁共振 - 正电子发射断层摄影装置中的正电子发射断层摄影图像数据集的衰减的衰减图公开(公告)号：US08314617B2
公开(公告)日：2012-11-20
申请号：US12585539
申请日：2009-09-17
IPC分类号： G01V3/00
CPC分类号： G01T1/1648 , A61B6/037 , A61B6/5247 , G01T1/1603
摘要： A method is disclosed for at least partly determining and/or adapting an attenuation map used for attenuation correction of Positron Emission Tomography image data sets in a combined Magnetic Resonance-Positron Emission Tomography device. In at least one embodiment of the method, at least one one-dimensional magnetic resonance data set of a patient is recorded along one imaging direction; the boundaries of at least one part of the body of the patient intersected by the imaging direction are determined from the one-dimensional magnetic resonance data set; and the attenuation map is determined and/or adapted at least partly as a function of the boundaries determined.
摘要翻译： 公开了一种用于至少部分地确定和/或调整用于组合的磁共振 - 正电子发射断层扫描装置中正电子发射断层摄影图像数据集的衰减校正的衰减图的方法。 在该方法的至少一个实施例中，沿着一个成像方向记录患者的至少一个一维磁共振数据集; 从一维磁共振数据集确定与成像方向相交的病人身体的至少一部分的边界; 并且至少部分地根据确定的边界的函数来确定和/或调整衰减图。
-
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。
-
9.发明申请公开(公告)号：US20120040322A1
公开(公告)日：2012-02-16
申请号：US13206579
申请日：2011-08-10
申请人： Ludwig Eberler , Matthias Fenchel , Ralf Ladebeck
发明人： Ludwig Eberler , Matthias Fenchel , Ralf Ladebeck
IPC分类号： G09B23/28
CPC分类号： G01R33/58 , G01R33/481
摘要： A phantom, particularly for use in MR- or PET-based imaging methods, includes a hollow base body that delimits an interior volume, wherein the interior volume is subdivided into at least two volume portions by at least one separation element, and wherein the separation element or a section thereof consists of foam.
摘要翻译： 特别是用于基于MR或PET的成像方法的体模包括限定内部体积的中空基体，其中内部体积被至少一个分离元件细分成至少两个体积部分，并且其中分离 元件或其一部分由泡沫构成。
-
公开(公告)号：US20100108895A1
公开(公告)日：2010-05-06
申请号：US12591003
申请日：2009-11-04
申请人： Ralf Ladebeck , Markus Vester
发明人： Ralf Ladebeck , Markus Vester
IPC分类号： G01T1/164
CPC分类号： G01T1/00
摘要： A method and a facility are disclosed for imaging a PET spectrum with a PET detector, especially a PE-MR tomograph, and evaluation of the PET spectrum. To improve the correction of the base line in PET and thereby to improve the energy resolution for the PET images, at least one embodiment of the facility includes: a sampling facility for sampling the output signal of the PET detector at a predetermined sampling rate; an edge discriminator for recognizing at least one edge of a PET pulse; a background signal discriminator for estimating a background signal under the PET pulse; and an integrator device for determining the energy of the PET pulse in the PET spectrum above of the background signal from the sample values of the sampling facility.
摘要翻译： 公开了一种利用PET检测器，特别是PE-MR断层摄影仪对PET光谱进行成像并评估PET光谱的方法和设备。 为了改善PET中基线的校正，从而提高PET图像的能量分辨率，设备的至少一个实施例包括：采样设备，用于以预定采样率对PET检测器的输出信号进行采样; 用于识别PET脉冲的至少一个边缘的边缘鉴别器; 背景信号鉴别器，用于估计PET脉冲下的背景信号; 以及积分器装置，用于根据来自采样设备的样本值的背景信号确定PET谱中PET脉冲的能量。
-
-
-
-
-
-
-
-
-
搜索结果
99 条记录 (耗时 0.032 秒)