专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

71. 发明申请

US20180081016A1 METHOD AND APPARATUS FOR ACCELERATED SIMULTANEOUS MULTISLICE MAGNETIC RESONANCE DATA ACQUISITION 审中-公开
公开(公告)号：US20180081016A1
公开(公告)日：2018-03-22
申请号：US15710078
申请日：2017-09-20
申请人： Siemens Healthcare GmbH
发明人： Flavio Carinci , Dominik Paul , Mario Zeller
IPC分类号： G01R33/561 , G01R33/36 , G01R33/54
CPC分类号： G01R33/5611 , G01R33/36 , G01R33/4835 , G01R33/543 , G01R33/5613
摘要： In a method and apparatus for generating magnetic resonance (MR) measurement data of an object, (a) a multiband RF excitation pulse is radiated into the object to simultaneously selectively excite at least two slices, which do not overlap, in the object, and (b) echo signals generated are read out with at least two reception coils and are stored in a measurement data record, and (c) after reading out a last echo signal that follows from the multiband RF excitation pulse, a driven equilibrium module is radiated that includes at least one further multiband RF pulse. Steps (a) to (c) are repeated with different position encoding and/or while exciting different slices, until all desired measurement data are stored in the measurement data record. The measurement data contained in the measurement data record are separated into slice-specific measurement data records on the basis of coil sensitivity data of the reception coils used for read-out purposes.

72. 发明申请

US20180017652A1 SYSTEM AND METHOD FOR MAGNETIC RESONANCE IMAGING 审中-公开
公开(公告)号：US20180017652A1
公开(公告)日：2018-01-18
申请号：US15594591
申请日：2017-05-13
申请人： SHANGHAI UNITED IMAGING HEALTHCARE CO., LTD.
发明人： Yongquan YE
IPC分类号： G01R33/565 , G01R33/561 , G01R33/56
CPC分类号： G01R33/5608 , A61B5/055 , G01R33/24 , G01R33/481 , G01R33/4824 , G01R33/50 , G01R33/56 , G01R33/5602 , G01R33/5613 , G01R33/5615 , G01R33/5616 , G01R33/5635 , G01R33/56545 , G01R33/60 , G06T11/003
摘要： A system and method for magnetic resonance imaging is provided. The method may include: determining a scanning parameter, wherein the scanning parameter includes one or more predetermined values; obtaining one or more MR signal sets based on the one or more predetermined values; generating one or more original images based on the one or more MR signal sets, wherein an original image corresponds to an MR signal set; determining one or more virtual values associated with the scanning parameter; and generating one or more virtual images based on the one or more virtual values and the one or more original images, wherein a virtual image corresponds to a virtual value.

73. 发明申请

US20170248670A1 System And Method For Accelerated Angiographic Magnetic Resonance Imaging 审中-公开
公开(公告)号：US20170248670A1
公开(公告)日：2017-08-31
申请号：US15053009
申请日：2016-02-25
申请人： Siemens Healthcare GmbH , NorthShore University HealthSystem
发明人： Shivraman Giri , Robert R. Edelman , Ioannis Koktzoglou
IPC分类号： G01R33/563 , G01R33/561
CPC分类号： G01R33/5635 , G01R33/4835 , G01R33/561 , G01R33/5611 , G01R33/5613 , G01R33/56383
摘要： A magnetic resonance method and system are provided for projection MR imaging of vascular structures within a subject, with scan times that are shorter than those needed for conventional techniques. Image acquisition sequences are synchronized with heartbeat cycles of the subject, and are configured to generate image data having a reduced spatial resolution in the projection direction perpendicular to a preselected projection plane. A reduction factor F quantifies this reduced resolution, such that the number of data acquisition sequences provided within each heartbeat cycle is F times as many as a comparable imaging protocol that generates full-resolution data. The total scan time can be reduced by a factor of F with negligible degradation in the projection image quality.

74. 发明申请

US20170219674A1 SYSTEM AND METHOD FOR MAGNETIC RESONANCE IMAGING WITH PROSPECTIVE MOTION CONTROL 审中-公开
公开(公告)号：US20170219674A1
公开(公告)日：2017-08-03
申请号：US15301860
申请日：2015-04-16
申请人： THE GENERAL HOSPITAL CORPORATION
发明人： Andre J.W. VAn Der Kouwe , Matthew D. Tisdale
IPC分类号： G01R33/565 , G01R33/561 , G01R33/567 , G01R33/483
CPC分类号： G01R33/56509 , A61B5/055 , G01R33/483 , G01R33/5613 , G01R33/5616 , G01R33/5673
摘要： A system and method for directing an MRI system to form echo signals from spins in a volume-of-interest (VOI) includes creating an integrated pulse sequence that integrates a volume navigator pulse sequence with an imaging pulse sequence by coordinating a navigator TR with an imaging TR to preserve a steady state of magnetization in the VOI associated with the imaging pulse sequence. The integrated pulse sequence includes performing the imaging pulse sequence to acquire imaging data from the VOI, performing the navigator pulse sequence to acquire navigator data VOI, processing the navigator data to generate motion estimates of motion in the VOI, creating an updated imaging pulse sequence that prospectively corrects for the motion in the VOI using the motion estimates, and repeating these steps using the updated imaging pulse sequence.

75. 发明授权

US09629569B2 Magnetic resonance imaging apparatus and image generation method for guidance and positioning 有权
公开(公告)号：US09629569B2
公开(公告)日：2017-04-25
申请号：US12425740
申请日：2009-04-17
申请人： Satoshi Sugiura
发明人： Satoshi Sugiura
IPC分类号： A61B5/055 , A61B6/00 , G01R33/56 , G01R33/561 , G01R33/563 , A61B5/00 , G01R33/54
CPC分类号： A61B5/055 , A61B5/0037 , A61B5/7285 , A61B6/488 , A61B6/541 , G01R33/543 , G01R33/5601 , G01R33/5605 , G01R33/5613 , G01R33/5635
摘要： A medical imaging apparatus includes a positioning image acquisition unit which acquires a positioning image concerning a subject, a unit which sets an region of interest in the positioning image in accordance with specification performed by an operator, a monitoring image acquisition unit which repeatedly acquires a monitoring image concerning the subject at predetermined time intervals, and a generation unit which combines an region-of-interest image representing the region of interest with the monitoring image to generate a display image every time the monitoring image is acquired.

76. 发明授权

US09551770B1 Functional magnetic resonance imaging by spatially modulating steady-state signal in steady-state free precession 有权
标题翻译：通过在稳态自由进动中空间调制稳态信号进行功能磁共振成像
公开(公告)号：US09551770B1
公开(公告)日：2017-01-24
申请号：US14164133
申请日：2014-01-24
申请人： Abbas Nasiraei Moghaddam
发明人： Abbas Nasiraei Moghaddam
IPC分类号： G01R33/48
CPC分类号： G01R33/5613 , G01R33/4806
摘要： A modified steady-state free-precession (SSFP) method for functional magnetic resonance imaging (fMRI) is disclosed for acquiring a complex-valued image of object. A modulating field gradient is applied to impart spatial modulation of the steady-state signal phase and magnitude across the complex-valued image of the object along the direction of the modulating field gradient. SSFP pulse sequence parameters and modulating field gradient parameters can be selected to optimize functional image contrast between, e.g., oxy- and deoxy-hemoglobin, derived from steady-state signal magnitude or phase of complex-valued images.
摘要翻译：公开了用于获取物体的复值图像的功能磁共振成像（fMRI）的改进的稳态自由进动（SSFP）方法。应用调制场梯度以沿着调制场梯度的方向对物体的复值图像赋予稳态信号相位和幅度的空间调制。可以选择SSFP脉冲序列参数和调制场梯度参数以优化衍生自复数值图像的稳态信号幅度或相位的例如氧 - 和脱氧血红蛋白之间的功能图像对比度。

77. 发明申请

US20150346300A1 Magnetic Resonance Fingerprinting (MRF) With Simultaneous Multivolume Acquisition 有权
标题翻译：具有同时多体积采集的磁共振指纹（MRF）
公开(公告)号：US20150346300A1
公开(公告)日：2015-12-03
申请号：US14711879
申请日：2015-05-14
申请人： Case Western Reserve University
发明人： Kawin Setsompop , Mark Griswold , Huihui Ye , Lawrence Wald , Dan Ma , Yun Jiang
IPC分类号： G01R33/48 , G01R33/54 , G01R33/50
CPC分类号： G01R33/4828 , G01R33/4824 , G01R33/50 , G01R33/5611 , G01R33/5613
摘要： Magnetic resonance fingerprinting (MRF) with simultaneous multivolume acquisition (SMVA) is described. One example nuclear magnetic resonance (NMR) apparatus includes an NMR logic that repetitively and variably samples (k, t, E) spaces associated with different volumes (e.g., slices) in an object to simultaneously acquire sets of NMR signals that are associated with different points in the (k, t, E) spaces. Sampling is performed with t and/or E varying in a non-constant way. The NMR apparatus may also include a signal logic that produces an NMR signal evolution from the NMR signals and compares the NMR signal evolution to reference signal evolutions. Since different volumes are excited differently, resulting signal evolutions can be acquired simultaneously from the different volumes and NMR parameters may be simultaneously determined for the multiple volumes, which reduces acquisition time and parameter map creation time.
摘要翻译：描述了具有同时多体积采集（SMVA）的磁共振指纹图谱（MRF）。一个例子，核磁共振（NMR）装置包括一个NMR逻辑，其重复地和可变地采样（k，t，E）与物体中的不同体积（例如切片）相关的空间，以同时获取与不同的NMR信号相关联的一组NMR信号（k，t，E）空格中的点。 t和/或E以非常数方式变化进行采样。 NMR装置还可以包括从NMR信号产生NMR信号的信号逻辑，并将NMR信号演变与参考信号演变进行比较。由于不同的体积被不同地激发，所以可以从不同的体积同时获得所得到的信号进化，并且可以同时确定多个体积的NMR参数，这降低了采集时间和参数图创建时间。

78. 发明申请

US20150123659A1 SYSTEM AND METHOD FOR FREE-BREATHING VOLUMETRIC IMAGING OF CARDIAC TISSUE 有权
标题翻译：免费呼吸心脏组织体积成像的系统和方法
公开(公告)号：US20150123659A1
公开(公告)日：2015-05-07
申请号：US14536008
申请日：2014-11-07
申请人： Sebastian Weingartner , Mehmet Akcakaya , Reza Nezafat
发明人： Sebastian Weingartner , Mehmet Akcakaya , Reza Nezafat
IPC分类号： G01R33/50 , G01R33/383 , G01R33/48
CPC分类号： G01R33/50 , A61B5/055 , A61B5/7285 , A61B2576/023 , G01R33/4818 , G01R33/4822 , G01R33/5602 , G01R33/5613 , G01R33/56325 , G01R33/56509 , G01R33/5673 , G01R33/5676
摘要： A magnetic resonance imaging (MRI) system and methods are provided for producing images of a subject. In some aspects, a method includes identifying a point in the cardiac cycle, performing an inversion recovery (IR) pulse at a selected time point from the pre-determined point, and sampling a k-space segment at an inversion time from the IR pulse that is substantially coincident with the pre-determined point. The method also includes repeating the IR pulse and k-space sampling for multiple inversion times, and multiple segments of k-space, in an interleaved manner, to generate datasets having T1-weighted contrasts determined by their respective inversion times. The method further includes reconstructing three-dimensional (3D) spatially-aligned images using the datasets, and generating a T1 recovery map by combining the 3D images. In some aspects, a prospective/retrospective scheme may be used to obtain data fully sampled in the center of k-space and randomly undersampled in the outer regions.
摘要翻译：提供磁共振成像（MRI）系统和方法来产生受试者的图像。在一些方面，一种方法包括识别心动周期中的点，在从预定点开始的选定时间点执行反转恢复（IR）脉冲，以及从IR脉冲在反转时间采样k空间段这与预定点基本一致。该方法还包括以交替方式重复IR反转时间的IR脉冲和k空间采样以及k空间的多个片段，以生成具有由它们各自反转时间确定的T1加权对比度的数据集。该方法还包括使用数据集重建三维（3D）空间对准的图像，以及通过组合3D图像生成T1恢复图。在一些方面，可以使用前瞻性/回顾性方案来获得在k-空间中心完全采样并在外部区域随机欠采样的数据。

79. 发明授权

US08798718B2 Method and apparatus to generate angiographic magnetic resonance images 有权
标题翻译：产生血管造影磁共振图像的方法和装置
公开(公告)号：US08798718B2
公开(公告)日：2014-08-05
申请号：US13085582
申请日：2011-04-13
申请人： Peter Schmitt
发明人： Peter Schmitt
IPC分类号： A61B5/055
CPC分类号： A61B5/055 , A61B5/0263 , A61B5/7285 , G01R33/4826 , G01R33/5613 , G01R33/5614 , G01R33/5635
摘要： In a magnetic resonance system and operating method, a series with a predetermined number of flip angles is established, that begins with a first flip angle that is smaller than the last flip angle of the series, and an arbitrary flip angle is greater than or equal to the preceding flip angle in the series. Respective predetermined regions of k-space are acquired that form first and second magnetic resonance data. Using a gradient echo sequence, each region is acquired during time interval as a series of components respectively with different flip angles in the series of flip angles. Each of the angiography magnetic resonance images has a flip angle range assigned thereto, and is formed by combining respective regions of k-space filled with components of the first and second magnetic resonance data that were acquired in that range.
摘要翻译：在磁共振系统和操作方法中，建立了具有预定数量的翻转角的一系列，其以比该系列的最后一个翻转角小的第一翻转角开始，任意翻转角大于或等于到系列中的前一个翻转角。获取形成第一和第二磁共振数据的k空间的各个预定区域。使用梯度回波序列，每个区域在时间间隔期间作为一系列分量，在一系列翻转角中分别具有不同的翻转角度。每个血管造影磁共振图像具有分配给其的翻转角范围，并且通过组合填充有在该范围中获取的第一和第二磁共振数据的分量的k空间的各个区域而形成。

80. 发明申请

US20140043026A1 SPATIALLY ENCODED PHASE-CONTRAST MRI 有权
标题翻译：空间编码相位对比MRI
公开(公告)号：US20140043026A1
公开(公告)日：2014-02-13
申请号：US14112541
申请日：2011-04-21
申请人： Jens Frahm , Klaus-Dietmar Merboldt , Martin Uecker , Dirk Voit
发明人： Jens Frahm , Klaus-Dietmar Merboldt , Martin Uecker , Dirk Voit
IPC分类号： G01R33/48
CPC分类号： G01R33/48 , G01R33/286 , G01R33/4826 , G01R33/5613 , G01R33/56316 , G01R33/56325
摘要： A method of collecting magnetic resonance data for imaging an object with a predetermined spin density being arranged in a static magnetic field, comprises the steps subjecting said object to at least one radiofrequency pulse and magnetic field gradients for creating spatially encoded magnetic resonance signals, including at least two settings of spatially encoding phase-contrast gradients differently encoding the phase of said magnetic resonance signals in at least one field of view in a predetermined spatial dimension, acquiring at least two magnetic resonance signals, each with one of said at least two settings of different spatially encoding phase-contrast gradients, and determining at least one mean spin density position of said object along said spatial dimension by calculating the phase difference between said signals. Furthermore, a control device and a magnetic resonance imaging (MRI) device implementing the method are described.
摘要翻译：收集用于对静电磁场中预定的自旋密度进行成像的磁共振数据的方法包括以下步骤：对所述物体进行至少一个射频脉冲和磁场梯度，以产生空间编码的磁共振信号，包括在空间编码相位对比度梯度的至少两个设置在预定的空间维度中以至少一个视野不同地编码所述磁共振信号的相位，获取至少两个磁共振信号，每个磁共振信号具有所述至少两个设置中的一个不同的空间编码相位对比度梯度，以及通过计算所述信号之间的相位差来确定所述物体沿着所述空间维度的至少一个平均自旋密度位置。此外，描述了实现该方法的控制装置和磁共振成像（MRI）装置。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式