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公开(公告)号：EP1307757B1
公开(公告)日：2012-09-12
申请号：EP01960497.4
申请日：2001-07-13
发明人： FUDERER, Miha , VAN DEN BRINK, Johan, S. , JURRISSEN, Michel, P., J. , VAN MUISWINKEL, Arianne, M., C. , KATSCHER, Ulrich
IPC分类号： G01R33/561 , G01R33/3415
CPC分类号： G01R33/5611 , G01R33/4835
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公开(公告)号：EP1307757A1
公开(公告)日：2003-05-07
申请号：EP01960497.4
申请日：2001-07-13
发明人： FUDERER, Miha , VAN DEN BRINK, Johan, S. , JURRISSEN, Michel, P., J. , VAN MUISWINKEL, Arianne, M., C. , KATSCHER, Ulrich
IPC分类号： G01R33/561 , G01R33/3415
CPC分类号： G01R33/5611 , G01R33/4835
摘要： A magnetic resonance imaging method employs sub-sampled signal acquisition from a number of receiver coils such as surface coils. A full field-of-view magnetic resonance image is reconstructed on the basis of the sensitivity profiles of the receiver coils, for example on the basis of the SENSE technique. The reconstruction is carried out mathematically as an optimization, for example, requiring a minimum noise level in the magnetic resonance image. According to the invention, a priori information is also involved in the reconstruction and the a priori information is taken into account especially as a constraint in said optimization.
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3.发明公开RETROSPECTIVE SELECTION AND VARIOUS TYPES OF IMAGE ALIGNMENT TO IMPROVE DTI SNR 审中-公开图像对齐的回顾性选择各级各类以提高英国贸工部SNR
公开(公告)号：EP1506528A1
公开(公告)日：2005-02-16
申请号：EP03720809.7
申请日：2003-05-13
CPC分类号： G06T17/00 , G01R33/56341 , G06T5/50 , G06T2207/10092 , G06T2207/20104 , G06T2207/20221 , G06T2207/30016
摘要： An imaging sequence, which generates a static image data set and a plurality of differently diffusion-weighted data sets, is repeated and the data sets stored in memories (360, 361,..., 36N). Each data set is reconstructed into corresponding images stored in sub memories (380, 381,..., 38N). The images are compared macroscopically (40) and shifted (42) into optimal alignment. Local regions of the images are analyzed (44) and adjusted (46) for better conformity. The static images and like spatially encoded images are compared with each other and those outside a preselected similarity threshold are rejected (48). The remaining like images are combined (50) and subject to a diffusion analysis (52) to generate an image of an anisotropic structure in the imaging region. The anisotropic structure and other image information are displayed on a monitor (58).
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4.发明公开DIFFUSION TENSOR MAGNETIC RESONANCE IMAGING INCLUDING LOCAL WEIGHTED INTERPOLATION 审中-公开磁共振成像基于局部加权插值扩散张量和
公开(公告)号：EP1506425A1
公开(公告)日：2005-02-16
申请号：EP03720807.1
申请日：2003-05-12
IPC分类号： G01R33/563 , G06T15/00
CPC分类号： G06T17/00 , G01R33/56341
摘要： An imaging method (150, 190) for imaging a subject (16) including fibrous or anisotropic structures (102) includes acquiring a three-dimensional apparent diffusion tensor map (162) of a region with some anisotropic structures (102). The apparent diffusion tensor at a voxel is processed (164) to obtain eigenvectors (e1, e2, e3) and eigenvalues ((1, (2, (3). A three-dimensional fiber representation (208) is extracted (190) using the eigenvectors and eigenvalues. During the extracting (190), voxels are locally interpolated (202) in at least a selected dimension in a vicinity of the fiber representation (208). The interpolating includes weighting the voxels by a parameter indicative of a local anisotropy. The interpolating results in a three-dimensional fiber representation (208) having a higher tracking accuracy and representation resolution than the acquired tensor map (162).
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公开(公告)号：EP1101126A1
公开(公告)日：2001-05-23
申请号：EP00935011.7
申请日：2000-05-04
发明人： VAN DEN BRINK, Johan, S. , LAMERICHS, Rudolf, M., J., N. , FOLKERS, Paulus, J., M. , VAN MUISWINKEL, Arianne, M., C. , PRUESSMANN, Klaas, P. , WEIGER, Markus , DYDAK, Ulrike
IPC分类号： G01R33/3415 , G01R33/561 , G01R33/483
CPC分类号： G01R33/4822 , G01R33/485 , G01R33/5611
摘要： A spectroscopic magnetic resonance imaging method involves sub-sampling in the k space. For example, the SENSE technique is applied in spectroscopic MR imaging. Such sub-sampling is also applied in three-dimensional MR imaging.
摘要翻译： 光谱磁共振成像方法涉及k空间中的子采样。 例如，SENSE技术应用于光谱MR成像。 这种子采样也应用于三维MR成像。
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公开(公告)号：EP1082690A1
公开(公告)日：2001-03-14
申请号：EP00925138.0
申请日：2000-03-27
IPC分类号： G06F19/00
CPC分类号： G06F19/321 , G06F19/00
摘要： The invention relates to a method of deriving time-averaged moments of a convolution profile from dynamic input and arrival profiles. A convolutive relation exists between the arrival profile and the input profile. According to the invention the time-averaged moment of the convolution profile is calculated from time-averaged moments of the dynamic input and arrival profiles. The method is used notably for the study of perfusion effects by means of magnetic resonance imaging.
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公开(公告)号：EP1620747B1
公开(公告)日：2009-08-26
申请号：EP04728879.0
申请日：2004-04-22
发明人： HOOGENRAAD, Frank, G., C. , VAN MUISWINKEL, Arianne, M., C. , HOLTHUIZEN, Ronaldus, F., J. , VAN DEN BRINK, Johan, S.
IPC分类号： G01R33/563
CPC分类号： G01R33/56341 , G01R33/4806
摘要： A method of deriving a directional structure from an object dataset is proposed. The object dataset assigns local directions to positions in a multidimensional geometrical space. For example the local directions concern local flow directions in a diffusion tensor magnetic resonance image at least one `region of interest' is selected on the basis of spatial functional information, such as an fMRI image, time correlation of an fMRI image series with a functional paradigm or an anatomical image. These `region of interest' are employed to initialize a fibre tracking to derive the directional structure that represents the nervous fibre system.
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公开(公告)号：EP1049940B1
公开(公告)日：2008-05-14
申请号：EP99972741.5
申请日：1999-11-12
IPC分类号： G01R33/563
CPC分类号： G01R33/56341 , G01R33/56554
摘要： The invention relates to a magnetic resonance imaging method. The method includes the execution of image pulse sequences for the measurement of magnetic resonance image signals and navigator signals. After the execution of the image pulse sequence, the navigator MR signal is checked so as to determine whether the navigator MR signal meets a predetermined quality criterion. If the navigator MR signal does not meet the quality criterion, the navigator MR signal and the magnetic resonance imaging signals corresponding to the navigator MR signal are measured again.
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9.发明公开DATA-PROCESSING TO FORM A COMPOUND OBJECT DATA SET FROM A PLURALITY OF BASIS DATASETS 审中-公开用于形成复合对象数据数据处理SET OFF库记录
公开(公告)号：EP1499908A1
公开(公告)日：2005-01-26
申请号：EP03708416.7
申请日：2003-03-20
发明人： VISSER, Frederik , HOOGEVEEN, Romhild, M. , PHILPSEN, Richard , VAN MUISWINKEL, Arianne, M., C.
IPC分类号： G01R33/56
CPC分类号： G01R33/56
摘要： A compound object data set is formed from a plurality of basis datasets. The basis datasets assigning datavalues to spatial positions in an at least three-dimensional space. The basis datasets are associated with mutually overlapping regions.Compound datavalues for spatial positions in the overlapping regions are computed, perferably by weighted interpolation from datavalues of respective basis datasets.
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公开(公告)号：EP1049940A1
公开(公告)日：2000-11-08
申请号：EP99972741.5
申请日：1999-11-12
IPC分类号： G01R33/563
CPC分类号： G01R33/56341 , G01R33/56554
摘要： The invention relates to a magnetic resonance imaging method. The method includes the execution of image pulse sequences for the measurement of magnetic resonance image signals and navigator signals. After the execution of the image pulse sequence, the navigator MR signal is checked so as to determine whether the navigator MR signal meets a predetermined quality criterion. If the navigator MR signal does not meet the quality criterion, the navigator MR signal and the magnetic resonance imaging signals corresponding to the navigator MR signal are measured again.
摘要翻译： 本发明涉及一种磁共振成像方法。 该方法包括执行用于测量磁共振图像信号和导航信号的图像脉冲序列。 在执行图像脉冲序列之后，检查导航器MR信号以确定导航器MR信号是否满足预定的质量标准。 如果导航器MR信号不符合质量标准，则再次测量导航器MR信号和对应于导航器MR信号的磁共振成像信号。
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