公开(公告)号：US20140050379A1

公开(公告)日：2014-02-20

申请号：US13587294

申请日：2012-08-16

申请人： MITSUE MIYAZAKI ,  Xiangzhi Zhou ,  Tsutomu Hoshino

发明人： MITSUE MIYAZAKI ,  Xiangzhi Zhou ,  Tsutomu Hoshino

IPC分类号： G06K9/46 ,  G06K9/00

CPC分类号： A61B5/0263 ,  A61B5/055 ,  A61B5/7289 ,  A61B2576/023 ,  G01R33/56366 ,  G06T7/0016 ,  G06T2207/30048 ,  G06T2207/30104

摘要： Elicited MRI signals are processed into MR image data in conjunction (a) with use of an initial spatially-selective RF tag pulse (tag-on) and (b) without use of an initial spatially-selective NMR RF tag pulse (tag-off) in respectively corresponding data acquisition subsequences. Multi-dimensional tag-on and tag-off data acquisition subsequences are used for each of plural time-to-inversion (TI) intervals without using an injected contrast agent. Acquired image data sets are subtracted for each TI interval to produce difference values as a function of time representing blood perfusion for the ROI that differentiates between normal, ischemic and infarct tissues.

摘要翻译： 使用初始空间选择性RF标签脉冲（标签打开）和（b）不使用初始空间选择性NMR RF标签脉冲（标签关闭）将引发的MRI信号结合（a）处理成MR图像数据 ）分别对应的数据采集子序列。 在不使用注入的造影剂的情况下，对多个时间 - 反转（TI）间隔中的每一个使用多维标记和标记数据采集子序列。 对每个TI间隔减去获取的图像数据集，以产生差异值作为时间的函数，代表对正常，缺血和梗死组织进行区分的ROI的血液灌注。

公开(公告)号：US20140062473A1

公开(公告)日：2014-03-06

申请号：US13601723

申请日：2012-08-31

申请人： MITSUE MIYAZAKI ,  Cheng Ouyang ,  Xiangzhi Zhou

发明人： MITSUE MIYAZAKI ,  Cheng Ouyang ,  Xiangzhi Zhou

IPC分类号： G01R33/48 ,  G01R33/28

CPC分类号： G01R33/50 ,  G01R33/4816 ,  G01R33/54 ,  G01R33/543 ,  G01R33/5605

摘要： A magnetic resonance imaging (MRI) system and method (a) acquires k-space data for a patient ROI over a predetermined band of RF frequencies using RF excitation pulses having respectively corresponding RF frequencies incrementally offset from a nuclear magnetic resonant (NMR) Larmor frequency for free nuclei thus causing chemical exchange saturation transfer (CEST) effects and to process such acquired data into Z-spectra data for voxels in the ROI; (b) analyzes the acquired Z-spectra data to provide spectral peak width data corresponding to T2/T2* tissue values in the ROI for macromolecules participating in magnetization transfer contrast (MTC) effects producing said Z-spectra data; and (c) stores and/or displays data representative of T2/T2* tissue values of the ROI which values are different for different tissues.

摘要翻译： 磁共振成像（MRI）系统和方法（a）使用具有逐渐偏离核磁共振（NMR）拉莫尔频率的分别对应的RF频率的RF激励脉冲获取在RF频率的预定频带上的患者ROI的k空间数据 对于自由核，从而导致化学交换饱和转移（CEST）效应，并将这些获取的数据处理成ROI中的体素的Z谱数据; （b）分析获得的Z光谱数据，以提供对应于参与产生所述Z光谱数据的磁化转移对比（MTC）效应的大分子的ROI中的T2 / T2 *组织值的光谱峰宽数据; 和（c）存储和/或显示表示不同组织的值不同的ROI的T2 / T2 *组织值的数据。

公开(公告)号：US20130088226A1

公开(公告)日：2013-04-11

申请号：US13267673

申请日：2011-10-06

申请人： MITSUE MIYAZAKI

发明人： MITSUE MIYAZAKI

IPC分类号： G01R33/48

CPC分类号： G01R33/5607 ,  G01R33/56563 ,  G01R33/56572

摘要： A magnetic resonance imaging (MRI) system and method uses an MRI gantry having a static magnet structure, controllable gradient magnet structures and at least one radio frequency (RF) coil for transmitting and receiving RF signals to and from an imaging volume. Control circuits are configured to control gradient magnetic fields generated by the gradient magnet structures, to transmit/receive RF signals to and from the at least one RF coil and to process RF signals received during a diagnostic MRI scan to produce displayable images of structures located within the imaging volume. The control circuits are configured to include a preparatory fat decoupling RF pulse as part of a patient ROI (region of interest) shimming sequence effected prior to a fat suppression type of diagnostic MRI data acquisition scan sequence.

摘要翻译： 磁共振成像（MRI）系统和方法使用具有静磁体结构的MRI台架，可控倾斜磁体结构和用于向成像体积传送和接收RF信号的至少一个射频（RF）线圈。 控制电路被配置为控制由梯度磁体结构产生的梯度磁场，以向至少一个RF线圈和从至少一个RF线圈发射/接收RF信号，并且处理在诊断MRI扫描期间接收的RF信号，以产生位于其内的结构的可显示图像 成像体积。 控制电路被配置为包括作为在脂肪抑制型诊断MRI数据采集扫描序列之前实现的患者ROI（感兴趣区域）匀场序列的一部分的预备脂肪去耦RF脉冲。

公开(公告)号：US20120283549A1

公开(公告)日：2012-11-08

申请号：US13098805

申请日：2011-05-02

申请人： MITSUE MIYAZAKI ,  Katsumi Nakamura ,  Akiyoshi Yamamoto

发明人： MITSUE MIYAZAKI ,  Katsumi Nakamura ,  Akiyoshi Yamamoto

IPC分类号： A61B5/055

CPC分类号： A61B5/0555 ,  A61B5/055 ,  G01R33/543 ,  G01R33/5635 ,  G01R33/56383 ,  G01R33/5673

摘要： A magnetic resonance imaging (MRI) system includes at least one controller configured to first acquire at least MRI locator image data for different portions of patient anatomy at each of different imaging stations for a defined multi-station locator sequence. An operator may interface with a respectively corresponding displayed locator image for each imaging station to set diagnostic scan sequence parameters for subsequent diagnostic MRI scans of corresponding portions of patient anatomy. Diagnostic MRI scan data is automatically acquired at each of the imaging stations in a multi-station diagnostic scan sequence that, if desired, can be seamlessly continued without operator interruption once begun.

摘要翻译： 磁共振成像（MRI）系统包括至少一个控制器，其被配置为针对定义的多站定位器序列，首先在每个不同成像站处首先获取用于患者解剖结构的不同部分的至少MRI定位器图像数据。 操作者可以与每个成像站的分别对应的显示的定位器图像接口，以设置诊断扫描序列参数，以用于患者解剖结构对应部分的后续诊断MRI扫描。 诊断MRI扫描数据在多站诊断扫描序列中的每个成像站处被自动获取，如果需要，可以无缝地继续，而无需操作员中断一旦开始。

公开(公告)号：US20130317348A1

公开(公告)日：2013-11-28

申请号：US13479680

申请日：2012-05-24

申请人： MITSUE MIYAZAKI

发明人： MITSUE MIYAZAKI

IPC分类号： A61B5/055

CPC分类号： A61B5/055 ,  A61B5/0037 ,  A61B5/201

摘要： A magnetic resonance imaging (MRI) system semi-automatically performs non-contrast magnetic resonance angiography (MRA). An operator display and control input port configures the MRI system to effect semi-automated non-contrast MRA imaging with spatially selective tag and venous suppression RF pulses and/or black blood time interval (BBTI) parameters in a non-contrast MRA data acquisition sequence where such parameters are automatically determined within predetermined, respectively corresponding, spatial regions of patient anatomy. Such automatically determined non-contrast MRA imaging parameters may be entirely automatically set and used or, alternatively, may be displayed to an operator for acceptance and/or change before being used.

摘要翻译： 磁共振成像（MRI）系统半自动执行非对比磁共振血管造影（MRA）。 操作者显示和控制输入端口配置MRI系统以在非对比MRA数据采集序列中进行空间选择性标签和静脉抑制RF脉冲和/或黑血时间间隔（BBTI）参数的半自动非对比MRA成像 其中这些参数在患者解剖结构的预定的相应的空间区域内自动确定。 这种自动确定的非造影MRA成像参数可以被完全自动设置和使用，或者替代地，可以在使用之前被显示给操作者以进行接受和/或改变。