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1. 发明申请

WO2016109234A1 METHOD AND APPARATUS FOR USING B1 MAP TO CORRECT INTENSITY OF MAGNETIC RESONANCE IMAGES 审中-公开
标题翻译：使用B1 MAP校正磁共振图像强度的方法和装置
公开(公告)号：WO2016109234A1
公开(公告)日：2016-07-07
申请号：PCT/US2015/066407
申请日：2015-12-17
申请人： GENERAL ELECTRIC COMPANY
发明人： GUI, Dawei , ZHAO, Xiaoli , ZHANG, Zhenghui , SHEN, Hao , GARNIER, Stephen
IPC分类号： G01R33/20 , G01R33/32 , G01R33/38
CPC分类号： G01R33/5659 , G01R33/246
摘要： A controller that is operatively connected with a magnet assembly, which defines a target volume; and an image processor, which is configured to obtain calibration data from the controller; map B1 transmit intensity from the magnet assembly to the target volume, based on the calibration data; calculate a B1 transmit shading correction based at least on the map of B1 transmit intensity and on pulse sequence parameters; obtain k-space data of an imaging subject within the target volume from the controller operating the magnet assembly based on the pulse sequence parameters; develop an MR image from the k-space data; and apply the B1 transmit shading correction to the MR image.
摘要翻译：控制器，其与限定目标体积的磁体组件可操作地连接; 以及图像处理器，被配置为从所述控制器获取校准数据; 基于校准数据将B1发射强度从磁体组件到目标体积; 至少基于B1发送强度和脉冲序列参数的映射计算B1发送阴影校正; 基于所述脉冲序列参数从所述控制器操作所述磁体组件获得所述目标体积内的成像对象的k空间数据; 从k空间数据开发MR图像; 并将B1发送阴影校正应用于MR图像。

2. 发明申请

WO2014189925A1 SYSTEM AND METHOD FOR REDUCING ACOUSTIC NOISE LEVEL IN MR IMAGING 审中-公开
标题翻译：用于降低成像噪声噪声水平的系统和方法
公开(公告)号：WO2014189925A1
公开(公告)日：2014-11-27
申请号：PCT/US2014/038782
申请日：2014-05-20
申请人： GENERAL ELECTRIC COMPANY
发明人： GUI, Dawei , LINZ, Anton M. , GADDIPATI, Ajeetkumar , ZHAO, Xiaoli , CHANG, Shaorong , HUO, Donglai
IPC分类号： A61B5/055
CPC分类号： G01R33/3854 , G01R33/4824 , G01R33/4826 , G01R33/5617
摘要： A system and method for reducing MRI-generated acoustic noise is disclosed. A system control of an MRI apparatus causes a plurality of gradient coils and an RF coil assembly in the MRI apparatus to generate pulse sequences that each cause an echo train to form and acquire blades of k-space data of the subject of interest from the pulse sequences, with the blades being rotated about a section of k-space compared to every other blade. The system control also causes the plurality of gradient coils to generate gradient pulses in each pulse sequence having an optimized gradient waveform that reduces an acoustic noise level generated thereby and causes the RF coil assembly to generate a 180 degree prep pulse subsequent to generation of an RF excitation pulse and prior to generation of a first RF refocusing pulse, the 180 degree prep pulse minimizing echo spacing in the echo train.
摘要翻译：公开了一种用于减少MRI产生的声学噪声的系统和方法。 MRI装置的系统控制使得MRI装置中的多个梯度线圈和RF线圈组件产生脉冲序列，每个脉冲序列使得回波序列从脉冲形成并获取感兴趣对象的k空间数据的叶片序列，与每个其他叶片相比，叶片围绕k空间的一部分旋转。系统控制还使得多个梯度线圈在具有优化的梯度波形的每个脉冲序列中产生梯度脉冲，其减小由此产生的声学噪声电平，并且使得RF线圈组件在产生RF之后产生180度预制脉冲激发脉冲，并且在产生第一RF再聚焦脉冲之前，180度准备脉冲使回波列中的回波间隔最小化。

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