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1. 发明授权

US09784805B2 MRI radio frequency receiver comprising digital down converter with connector that passes analog signal being contained within radio frequency receiver coil unit 有权
公开(公告)号：US09784805B2
公开(公告)日：2017-10-10
申请号：US12665336
申请日：2008-06-16
申请人： Marc Paul Saes , Johan Samuel Van Den Brink , Filips Van Liere , Roel Penterman , Ralph Kurt , Emiel Peeters , Dirk Jan Broer , Michel Paul Barbara Van Bruggen , Hans Van Zon , Miha Fuderer
发明人： Marc Paul Saes , Johan Samuel Van Den Brink , Filips Van Liere , Roel Penterman , Ralph Kurt , Emiel Peeters , Dirk Jan Broer , Michel Paul Barbara Van Bruggen , Hans Van Zon , Miha Fuderer
IPC分类号： G01R33/341 , G01R33/3415 , G01R33/36
CPC分类号： G01R33/341 , G01R33/3415 , G01R33/3621 , G01R33/3692
摘要： The invention relates to a nuclear magnetic resonance imaging radio frequency-receiver (112; 216; 308; 404), the receiver (112; 216; 308; 404) being adapted to receive analog signals from at least one radio frequency receiver coil unit (106; 200; 202; 300; 400; 402), the radio frequency receiver (112; 216; 308; 404) comprising: an analog-digital converter (118; 226) to convert the analog pre-amplified magnetic resonance signal into a digital signal, means (120; 230) for digital down converting the digital signal and a first communication interface (130; 252) adapted for transmitting the down converted digital signal via a communication link (e.g. wireless, optical or wire-bound).

2. 发明申请

US20100259261A1 MRI RADIO FREQUENCY RECEIVER COMPRISING DIGITAL DOWN CONVERTER 有权
标题翻译：包含数字下变频器的磁共振无线电频率接收机
公开(公告)号：US20100259261A1
公开(公告)日：2010-10-14
申请号：US12665336
申请日：2008-06-16
申请人： Marc Paul Saes , Johan Samuel Van Den Brink , Filips Van Liere , Roel Penterman , Ralph Kurt , Emiel Peeters , Dirk Broer , Michel Paul Barbara Van Bruggen , Hans Van Zon , Miha Fuderer
发明人： Marc Paul Saes , Johan Samuel Van Den Brink , Filips Van Liere , Roel Penterman , Ralph Kurt , Emiel Peeters , Dirk Broer , Michel Paul Barbara Van Bruggen , Hans Van Zon , Miha Fuderer
IPC分类号： G01R33/48
CPC分类号： G01R33/341 , G01R33/3415 , G01R33/3621 , G01R33/3692
摘要： The invention relates to a nuclear magnetic resonance imaging radio frequency—receiver (112; 216; 308; 404), the receiver (112; 216; 308; 404) being adapted to receive analogue signals from at least one radio frequency receiver coil unit (106; 200; 202; 300; 400; 402), the radio frequency receiver (112; 216; 308; 404) comprising: an analogue-digital converter (118; 226) to convert the analogue pre-amplified magnetic resonance signal into a digital signal, means (120; 230) for digital down converting the digital signal and a first communication interface (130; 252) adapted for transmitting the down converted digital signal via a communication link (e.g. wireless, optical or wire-bound).
摘要翻译：本发明涉及一种核磁共振成像射频接收器（112; 216; 308; 404），所述接收器（112; 216; 308; 404）适于接收来自至少一个射频接收器线圈单元 106; 200; 202; 300; 400; 402），所述射频接收器（112; 216; 308; 404）包括：模拟数字转换器（118; 226），用于将所述模拟预放大磁共振信号转换成数字信号，用于数字下变频数字信号的装置（120; 230）和适于经由通信链路（例如无线，光或有线）发送经下变频的数字信号的第一通信接口（130; 252）。

3. 发明授权

US06897653B2 MRI method for correcting amplitude of resonance signals 失效
标题翻译：用于校正谐振信号幅度的MRI方法
公开(公告)号：US06897653B2
公开(公告)日：2005-05-24
申请号：US09992699
申请日：2001-11-14
申请人： Johan Samuel Van Den Brink , Miha Fuderer
发明人： Johan Samuel Van Den Brink , Miha Fuderer
IPC分类号： G01R33/36 , A61B5/055 , G01R33/565 , G01V3/00
CPC分类号： G01R33/56518
摘要： In a magnetic resonance imaging method flow quantities and diffusion quantities are measured in the presence of temporary magnetic gradient fields (gradient pulses). Signal amplitudes of the magnetic resonance signals and/or flow and diffusion quantities calculated from the magnetic resonance signals are corrected for non-linearities in the magnetic gradient fields.
摘要翻译：在磁共振成像方法中，在临时磁梯度场（梯度脉冲）的存在下测量流量和扩散量。根据磁共振信号计算的磁共振信号和/或流量和扩散量的信号幅度被校正为磁梯度场中的非线性。

4. 发明授权

US06518760B2 Magnetic resonance imaging method with sub-sampled acquisition 有权
标题翻译：磁共振成像方法采用次采样
公开(公告)号：US06518760B2
公开(公告)日：2003-02-11
申请号：US09918160
申请日：2001-07-30
申请人： Miha Fuderer , Johan Samuel Van Den Brink , Michel Paul Jurriaan Jurrissen , Arianne Margarethe Corinne Van Muiswinkel , Ulrich Katscher
发明人： Miha Fuderer , Johan Samuel Van Den Brink , Michel Paul Jurriaan Jurrissen , Arianne Margarethe Corinne Van Muiswinkel , Ulrich Katscher
IPC分类号： G01V300
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 optimization.
摘要翻译：磁共振成像方法采用来自多个接收线圈（例如表面线圈）的子采样信号采集。基于接收器线圈的灵敏度分布，例如基于SENSE技术，重建完整的视场磁共振图像。重建在数学上进行为优化，例如要求磁共振图像中的最小噪声电平。根据本发明，先验信息也涉及重建，并且先验信息被特别地考虑在优化中作为约束。

5. 发明授权

US07417429B2 Moving table MRI with subsampling in parallel 失效
标题翻译：移动表MRI并行采样
公开(公告)号：US07417429B2
公开(公告)日：2008-08-26
申请号：US10547196
申请日：2004-02-18
申请人： Miha Fuderer , Paul Royston Harvey , Johan Samuel Van Den Brink
发明人： Miha Fuderer , Paul Royston Harvey , Johan Samuel Van Den Brink
IPC分类号： G01V3/00
CPC分类号： G01R33/56375 , G01R33/5611
摘要： A novel magnetic resonance imaging method is described, for forming an image of an object from a plurality of signals sampled in a restricted homogeneity region of a main magnet field of a magnetic resonance imaging apparatus. A patient disposed on a table is moved continuously through the bore of the main magnet and spins in a predetermined area of the patient are excited by an excitation pulse from a transmitter antenna, such that an image is formed over a region exceeding largely the restricted region. Data is undersampled in the restricted region by means off at least one receiver antenna in a plurality of receive situations being defined as a block of measurements contiguous in time having preserved magnetisation and presaturation conditions within the excited area of the patient. Fold-over artefacts due to said undersampling are unfolded by means of the known sensitivity pattern of the receiver antenna and/or the properties of selected factors determining said receive situations.
摘要翻译：描述了一种新颖的磁共振成像方法，用于从在磁共振成像装置的主磁场的受限同质区域中采样的多个信号形成物体的图像。设置在桌子上的患者连续移动通过主磁体的孔并且在患者的预定区域中的旋转被来自发射器天线的激励脉冲激发，使得在超过大部分限制区域的区域上形成图像。通过在多个接收情况中的至少一个接收机天线被限定为在时间上相邻的测量块，其在患者的激动区域内保持了磁化和预饱和状态，因此在受限区域中数据被欠采样。由于所述欠采样引起的折叠伪影通过接收机天线的已知灵敏度图案和/或确定所述接收情况的选定因素的特性而展开。

6. 发明申请

US20080262340A1 Moving Table Mri 审中-公开
标题翻译：移动表Mri
公开(公告)号：US20080262340A1
公开(公告)日：2008-10-23
申请号：US11569069
申请日：2005-05-12
申请人： Cornelis Leonardus Gerardus Ham , Miha Fuderer , Johan Samuel Van Den Brink
发明人： Cornelis Leonardus Gerardus Ham , Miha Fuderer , Johan Samuel Van Den Brink
IPC分类号： A61B5/055 , G01R33/563
CPC分类号： G01R33/56375
摘要： The invention relates to a MRI system and to a method for producing an image with such an system. In order to provide a MR imaging technique with a high efficient MR signal acquisition, which provides a high level of comfort to a patient, a MRI system and method are suggested, where image data from an object are acquired while the object is moving with variable speed relative to the MRI system, and where the image data are combined and an image of the object is reconstructed.
摘要翻译：本发明涉及一种MRI系统和一种用这种系统生产图像的方法。为了提供具有高效MR信号采集的MR成像技术，其为患者提供高水平的舒适性，建议了MRI系统和方法，其中在物体运动时获取来自对象的图像数据，相对于MRI系统的速度，并且其中图像数据被组合并且重建对象的图像。

7. 发明授权

US09689941B2 Passive B1 field shimming 有权
公开(公告)号：US09689941B2
公开(公告)日：2017-06-27
申请号：US13993689
申请日：2011-12-05
申请人： Zhiyong Zhai , Michael Andrew Morich , Paul Royston Harvey , Miha Fuderer
发明人： Zhiyong Zhai , Michael Andrew Morich , Paul Royston Harvey , Miha Fuderer
IPC分类号： G01R33/3873 , G01R33/24 , G01R33/565 , G01R33/54 , G01R33/34
CPC分类号： G01R33/3873 , G01R33/246 , G01R33/34 , G01R33/34076 , G01R33/543 , G01R33/5659
摘要： Coil elements (18) generate a B1 excitation field in an examination region (14), which B1 excitation field is distorted by patient loading (e.g., wavelength effects). Passive shimming elements (22, 24) are disposed between the coil elements and the subject in order to improve the B1 field uniformity. In one embodiment, passive shimming elements include one or more dielectric rods (55) disposed below the subject which generate no substantial MR proton signal and which have a permittivity of at least 100 and preferably greater than 500. In another embodiment, tubes (24) adjacent each coil element are supplied with a dielectric liquid, a thickness of the dielectric liquid between the coil element and the subject adjusting a phase of the B1 field generated by the coil element. Active B1 shimming may be combined with passive shimming elements (22, 24) to effect an improved RF field homogeneity result.

8. 发明申请

US20130278262A1 PASSIVE B1 FIELD SHIMMING 有权
标题翻译：被动B1场SHIMMING
公开(公告)号：US20130278262A1
公开(公告)日：2013-10-24
申请号：US13993689
申请日：2011-12-05
申请人： Zhiyong Zhai , Michael Andrew Morich , Paul Royston Harvey , Miha Fuderer
发明人： Zhiyong Zhai , Michael Andrew Morich , Paul Royston Harvey , Miha Fuderer
IPC分类号： G01R33/3873
CPC分类号： G01R33/3873 , G01R33/246 , G01R33/34 , G01R33/34076 , G01R33/543 , G01R33/5659
摘要： Coil elements (18) generate a B1 excitation field in an examination region (14), which B1 excitation field is distorted by patient loading (e.g., wavelength effects). Passive shimming elements (22, 24) are disposed between the coil elements and the subject in order to improve the B1 field uniformity. In one embodiment, passive shimming elements include one or more dielectric rods (55) disposed below the subject which generate no substantial MR proton signal and which have a permittivity of at least 100 and preferably greater than 500. In another embodiment, tubes (24) adjacent each coil element are supplied with a dielectric liquid, a thickness of the dielectric liquid between the coil element and the subject adjusting a phase of the B1 field generated by the coil element. Active B1 shimming may be combined with passive shimming elements (22, 24) to effect an improved RF field homogeneity result.
摘要翻译：线圈元件（18）在检查区域（14）中产生B1激励场，其中B1激励场由患者负载变形（例如，波长效应）。被动调光元件（22,24）设置在线圈元件和被摄体之间，以提高B1场均匀性。在一个实施例中，被动调光元件包括设置在对象下方的一个或多个介电棒（55），其不产生实质的MR质子信号，并且具有至少100，优选大于500的介电常数。在另一实施例中，管（24）相邻的每个线圈元件被提供有电介质液体，线圈元件和对象之间的电介质液体的厚度调节由线圈元件产生的B1场的相位。有源B1匀场可以与被动调光元件（22,24）组合以实现改进的RF场均匀性结果。

9. 发明授权

US07208949B2 Magnetic resonance method with non-linear magnetic field gradients 失效
标题翻译：具有非线性磁场梯度的磁共振方法
公开(公告)号：US07208949B2
公开(公告)日：2007-04-24
申请号：US10542828
申请日：2003-12-15
申请人： Miha Fuderer
发明人： Miha Fuderer
IPC分类号： G01V3/00
CPC分类号： G01R33/56518 , G01R33/5611 , G01R33/56563
摘要： A magnetic resonance imaging method is presented for forming an image of an object, wherein a stationary magnetic field and temporary magnetic fields having a position dependent field pattern are applied, magnetic resonance signals are acquired by at least one receiver antenna, spins are excitated in a part of the object, MR signals are acquired during application of the position-dependent field patterns (G1, G2, . . . ) and a magnetic resonance image is derived from the sampled magnetic resonance signals. The field patterns are substantially non-linear, the number N of total field patterns is larger than 3, and at least N−1 field patterns are independently controllable in field strength. The magnetic resonance signals are acquired in a sub-sampling fashion.
摘要翻译：提出了用于形成物体的图像的磁共振成像方法，其中施加具有位置相关磁场图案的固定磁场和临时磁场，通过至少一个接收器天线获取磁共振信号，旋转在在对象的一部分中，在施加位置相关的场图案（G 1，G 2，...）期间获取MR信号，并且从采样的磁共振信号导出磁共振图像。场图案基本上是非线性的，总场图案的数量N大于3，并且至少N-1场图案在场强中是独立可控的。以次采样的方式获取磁共振信号。

10. 发明授权

US6049623A Directional adaptive noise reduction 失效
标题翻译：定向自适应降噪
公开(公告)号：US6049623A
公开(公告)日：2000-04-11
申请号：US770389
申请日：1996-12-20
申请人： Miha Fuderer , Til Aach , Dietmar W. Kunz
发明人： Miha Fuderer , Til Aach , Dietmar W. Kunz
IPC分类号： A61B5/055 , G06T1/00 , G06T5/00 , G06T5/20 , G06T7/20 , G06K9/00
CPC分类号： G06T5/20 , G01R33/5608
摘要： An image is processed taking into account the direction of a predominant structure of the image. Said predominant direction is derived from image information in the image. In particular, the covariance matrix having matrix elements depending on products of differences between pixel-values in separate directions is calculated. The eigenvectors of the covariance matrix correspond with the predominant direction of the image structure and the eigenvalues of the covariance matrix represent the strength of the structure in the image. The covariance matrix is computed locally, i.e. for separate regions in the images so as to take variations of the direction of predominant structures into account.
摘要翻译：考虑到图像的主要结构的方向来处理图像。所述主要方向来源于图像中的图像信息。特别地，计算具有取决于分离方向上的像素值之间的差的乘积的矩阵元素的协方差矩阵。协方差矩阵的特征向量与图像结构的主要方向对应，协方差矩阵的特征值表示图像中结构的强度。局部计算协方差矩阵，即为图像中的单独区域计算，以便考虑主要结构方向的变化。

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