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1. 发明授权

US06882150B2 Diffusion weighted multiple spin echo (rare) sequence with periodically amplitude-modulated crusher gradients 失效
标题翻译：扩散加权多自旋回波（稀有）序列与周期性振幅调制的破碎机梯度
公开(公告)号：US06882150B2
公开(公告)日：2005-04-19
申请号：US10498415
申请日：2002-11-27
申请人： Hans Gerard Jenniskens , Gerrit Hendrik Van Yperen , Johannes Petrus Groen
发明人： Hans Gerard Jenniskens , Gerrit Hendrik Van Yperen , Johannes Petrus Groen
IPC分类号： G01R33/48 , A61B5/055 , G01R33/561 , G01V3/00
CPC分类号： G01R33/5615
摘要： A magnetic resonance imaging method which involves a pulse sequence for generating magnetic resonance signals and in which diffusion weighting is applied, for example, by way of a pair of gradient pulses which are separated by a 180° refocusing RF pulse. The magnetic resonance signals are generated as spin echo signals due to refocusing pulses. The refocusing pulses are flanked by compensation gradient pulses and the gradient strengths of the compensation gradient pulses are alternated according to a periodic pattern.
摘要翻译：一种磁共振成像方法，其包括用于产生磁共振信号的脉冲序列，并且其中例如通过由180°重聚焦RF脉冲分离的一对梯度脉冲施加扩散加权。磁共振信号由于重聚焦脉冲而产生为自旋回波信号。重聚焦脉冲侧面是补偿梯度脉冲，并且补偿梯度脉冲的梯度强度根据周期性图案交替。

2. 发明授权

US07750630B2 Magnetic resonance device and method for energizing receiving units 有权
标题翻译：用于激励接收单元的磁共振装置和方法
公开(公告)号：US07750630B2
公开(公告)日：2010-07-06
申请号：US11721173
申请日：2005-12-14
申请人： Marinus Johannes Adrianus Maria Van Helvoort , Johannes Petrus Groen , Robert Paul Kleihorst , Cornelis Leonardus Gerardus Ham
发明人： Marinus Johannes Adrianus Maria Van Helvoort , Johannes Petrus Groen , Robert Paul Kleihorst , Cornelis Leonardus Gerardus Ham
IPC分类号： G01V3/00
CPC分类号： G01R33/3692 , G01R33/3415 , G01R33/3621
摘要： The invention relates to a device (1) for magnetic resonance imaging of a body (7), comprising a main magnet (2) for generation of a stationary and substantially homogeneous main magnetic field within the examination zone, a plurality of wireless receiving units (10a, 10b) placed in or near the examination zone, and sampling means (21a, 21b) operating at a variable sampling frequency for sampling the received MR signals and for converting them into digital signal samples. The invention proposes to make provision for energizing means (17) generating an RF energizing field within the examination zone for inductively supplying electric power to the wireless receiving units (10a, 10b), wherein the frequency of the RF energizing field is an integer multiple of the sampling frequency.
摘要翻译：本发明涉及一种用于身体（7）的磁共振成像的装置（1），包括用于在检查区内产生静止且基本均匀的主磁场的主磁体（2），多个无线接收单元 10a，10b），以及以可变采样频率工作的采样装置（21a，21b），用于对接收的MR信号进行采样并将其转换成数字信号采样。本发明提出为激励装置（17）提供在检查区域内产生用于向无线接收单元（10a，10b）感应供电的RF激励场，其中RF激励场的频率为采样频率。

3. 发明申请

US20090237079A1 MAGNETIC RESONANCE DEVICE AND METHOD 有权
标题翻译：磁共振装置及方法
公开(公告)号：US20090237079A1
公开(公告)日：2009-09-24
申请号：US11721173
申请日：2005-12-14
申请人： Marinus Johannes Adrianus Maria Van Helvoort , Johannes Petrus Groen , Robert Paul Kleihorst , Cornelis Leonardus Gerardus Ham
发明人： Marinus Johannes Adrianus Maria Van Helvoort , Johannes Petrus Groen , Robert Paul Kleihorst , Cornelis Leonardus Gerardus Ham
IPC分类号： G01R33/46 , G01R33/36
CPC分类号： G01R33/3692 , G01R33/3415 , G01R33/3621
摘要： The invention relates to a device (1) for magnetic resonance imaging of a body (7), comprising a main magnet (2) for generation of a stationary and substantially homogeneous main magnetic field within the examination zone, a plurality of wireless receiving units (10a, 10b) placed in or near the examination zone, and sampling means (21a, 21b) operating at a variable sampling frequency for sampling the received MR signals and for converting them into digital signal samples. In order to provide an MR device (1), which is arranged to inductively energize the wireless receiving units (10a, 10b) without interference with the nuclear spin system of the examined object (7) and which does not necessarily require bulky energy storage means for the operation of the wireless receiving units (10a, 10b), the invention proposes to make provision for energizing means (17) generating an RF energizing field within the examination zone for inductively supplying electric power to the wireless receiving units (10a, 10b), wherein the frequency of the RF energizing field is an integer multiple of the sampling frequency.
摘要翻译：本发明涉及一种用于身体（7）的磁共振成像的装置（1），包括用于在检查区内产生静止且基本均匀的主磁场的主磁体（2），多个无线接收单元 10a，10b），以及以可变采样频率工作的采样装置（21a，21b），用于对接收的MR信号进行采样并将其转换成数字信号采样。为了提供一种MR装置（1），其被布置成在不干扰检查对象（7）的核自旋系统的情况下感应地激励无线接收单元（10a，10b），并且不一定需要庞大的能量存储装置为了无线接收单元（10a，10b）的操作，本发明提出为激励装置（17）提供在该检查区域内产生用于向无线接收单元（10a，10b）供电的电力的RF激励场，，其中所述RF激励场的频率是所述采样频率的整数倍。

4. 发明授权

US07372265B2 Compensation of magnetic field disturbances due to vibrations in an MRI system 失效
标题翻译： MRI系统振动引起的磁场干扰的补偿
公开(公告)号：US07372265B2
公开(公告)日：2008-05-13
申请号：US10544513
申请日：2004-01-29
申请人： Cornelis Leonardus Gerardus Ham , Wilhelmus Reinerius Maria Mens , Johannes Petrus Groen
发明人： Cornelis Leonardus Gerardus Ham , Wilhelmus Reinerius Maria Mens , Johannes Petrus Groen
IPC分类号： G01V3/00
CPC分类号： G01R33/3854
摘要： A magnetic resonance imaging (MRI) system includes an examination volume (9), a main magnet system (17) for generating a main magnetic field (B0) in the examination volume, a gradient magnet system (25) for generating gradients of the main magnetic field, and a control system (37) for compensating disturbances of the magnetic field caused by mechanical vibrations of the MRI system. The control system is a feed-forward control system which determines a necessary compensation for said disturbances in dependence on an electric current in the gradient magnet system according to a predetermined response relation. Since in most MRI systems the mechanical vibrations are predominantly caused by the altering electric currents in the gradient magnet system and by eddy currents induced thereby, an accurate and reliable compensation for said disturbances is provided, so that artifacts and other distortions of the reconstructed image caused by said disturbances are considerably reduced.
摘要翻译：磁共振成像（MRI）系统包括检查体积（9），用于在检查体积中产生主磁场（B 0>）的主磁体系统（17），梯度磁体系统 25），用于产生主磁场的梯度的控制系统（37），以及用于补偿由MRI系统的机械振动引起的磁场的扰动的控制系统（37）。控制系统是前馈控制系统，其根据预定的响应关系，根据梯度磁铁系统中的电流确定对所述干扰的必要补偿。由于在大多数MRI系统中，机械振动主要是由梯度磁体系统中的变化电流和由此引起的涡流引起的，因此提供了对所述扰动的准确可靠的补偿，从而引起重建图像的伪像和其他失真通过所述干扰大大减少。

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