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1. 发明公开

EP2710395A1 MR IMAGING WITH B1 MAPPING 审中-公开
标题翻译：用B1映射进行MR成像
公开(公告)号：EP2710395A1
公开(公告)日：2014-03-26
申请号：EP12715204.9
申请日：2012-04-02
申请人： Koninklijke Philips N.V. , Philips Intellectual Property & Standards GmbH
发明人： VAN DER MEULEN, Peter , BOERNERT, Peter , NEHRKE, Kay
IPC分类号： G01R33/24
CPC分类号： G01R33/288 , G01R33/246
摘要： The invention relates to a method of MR imaging, wherein a portion of a body is subjected to an imaging sequence of RF pulses and switched magnetic field gradients, which imaging sequence is a stimulated echo sequence including an off-resonant Bloch- Siegert RF pulse (BS) radiated during a preparation period (21) of the stimulated echo sequence. A B
1 map is derived from the acquired stimulated echo MR signals. Moreover, the invention relates to a method of MR imaging, wherein a portion of a body is subjected to a first imaging sequence, which comprises a first composite excitation RF pulse consisting of two RF pulse components having essentially equal flip angles and being out of phase by essentially 90°. Further, the portion of the body is subjected to a second imaging sequence, wherein a B
1 map is derived from signal data acquired by means of the first and second imaging sequences.
摘要翻译：本发明涉及一种MR成像方法，其中身体的一部分经受RF脉冲和切换磁场梯度的成像序列，该成像序列是包括非谐振Bloch-Siegert RF脉冲的受激回波序列（ BS）在受激回波序列的准备时段（21）期间辐射。 B 1图谱从采集的刺激回波MR信号中导出。此外，本发明涉及MR成像的方法，其中身体的一部分经受第一成像序列，该第一成像序列包括第一复合激励RF脉冲，该第一复合激励RF脉冲由具有基本相等翻转角并且相位相反的两个RF脉冲分量组成基本上为90°。此外，身体的该部分经受第二成像序列，其中B 1图谱从通过第一和第二成像序列获取的信号数据中导出。

2. 发明申请

WO2008087586A1 DETERMINATION OF SUSCEPTIBILITY-INDUCED MAGNETIC FIELD GRADIENTS BY MAGNETIC RESONANCE 审中-公开
标题翻译：通过磁共振测定可触发感应磁场梯度
公开(公告)号：WO2008087586A1
公开(公告)日：2008-07-24
申请号：PCT/IB2008/050126
申请日：2008-01-15
申请人： KONINKLIJKE PHILIPS ELECTRONICS N.V. , PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBH , DAHNKE, Hannes , SCHAEFFTER, Tobias , VAN DER MEULEN, Peter
发明人： DAHNKE, Hannes , SCHAEFFTER, Tobias , VAN DER MEULEN, Peter
IPC分类号： G01R33/28 , G01R33/48 , G01R33/3875
CPC分类号： G01R33/56536 , G01R33/243 , G01R33/281 , G01R33/286 , G01R33/3875 , G01R33/48 , G01R33/5601
摘要： The invention relates to a device for magnetic resonance imaging of a body (7). The device (1) comprises means (2) for establishing a substantially homogeneous main magnetic field in the examination volume, means (3, 4, 5) for generating switched magnetic field gradients superimposed upon the main magnetic field, means (6) for radiating RF pulses towards the body (7), control means (12) for controlling the generation of the magnetic field gradients and the RF pulses, means (10) for receiving and sampling magnetic resonance signals, and reconstruction means (14) for forming MR images from the signal samples. In accordance with the invention, the device is arranged to a) generate a series of MR echo signals (20) by subjecting at least a portion of the body (7) to an MR imaging sequence of RF pulses and switched magnetic field gradients, b) acquire the MR echo signals for reconstructing an MR image data set (21) therefrom, c) calculate a gradient map (22) by co mput ing echo shift parameters (SP x , SP y , SP z ) from subsets of the MR image data set, the echo shift parameters (SP x , SP y , SP z ) indicating magnetic field gradient induced shifts of the echo positions in k-space, wherein each subset comprises a number ( n ) of spatially adjacent pixel or voxel values of the MR image data set (21).
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。装置（1）包括用于在检查体积中建立基本均匀的主磁场的装置（2），用于产生叠加在主磁场上的开关磁场梯度的装置（3,4,5），用于辐射的装置（6）朝向身体（7）的RF脉冲，用于控制磁场梯度和RF脉冲的产生的控制装置（12），用于接收和采样磁共振信号的装置（10），以及用于形成MR图像的重建装置（14）从信号样本。根据本发明，该装置被设置成：a）通过使身体（7）的至少一部分经受RF脉冲的MR成像序列和切换的磁场梯度来生成一系列MR回波信号（20），b ）获取用于重建MR图像数据集（21）的MR回波信号，c）通过输入回波移位参数（SP SP x S，SP SP）计算梯度图（22） MR图像数据组的子集，回波移位参数（SP ，SP＆gt; Z＆lt; / SUB＆gt; 指示磁场梯度引起k空间中的回波位置的移位，其中每个子集包括MR图像数据集（21）的空间相邻像素的数量（n）或体素值。

3. 发明申请

WO2012140536A1 MR IMAGING WITH B1MAPPING 审中-公开
标题翻译：拍摄与拍摄
公开(公告)号：WO2012140536A1
公开(公告)日：2012-10-18
申请号：PCT/IB2012/051590
申请日：2012-04-02
申请人： KONINKLIJKE PHILIPS ELECTRONICS N.V. , PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBH , VAN DER MEULEN, Peter , BOERNERT, Peter , NEHRKE, Kay
发明人： VAN DER MEULEN, Peter , BOERNERT, Peter , NEHRKE, Kay
IPC分类号： G01R33/24
CPC分类号： G01R33/288 , G01R33/246
摘要： The invention relates to a method of MR imaging, wherein a portion of a body is subjected to an imaging sequence of RF pulses and switched magnetic field gradients, which imaging sequence is a stimulated echo sequence including an off-resonant Bloch- Siegert RF pulse (BS) radiated during a preparation period (21) of the stimulated echo sequence. A B 1 map is derived from the acquired stimulated echo MR signals. Moreover, the invention relates to a method of MR imaging, wherein a portion of a body is subjected to a first imaging sequence, which comprises a first composite excitation RF pulse consisting of two RF pulse components having essentially equal flip angles and being out of phase by essentially 90°. Further, the portion of the body is subjected to a second imaging sequence, wherein a B 1 map is derived from signal data acquired by means of the first and second imaging sequences.
摘要翻译：本发明涉及一种MR成像方法，其中身体的一部分经受RF脉冲和切换磁场梯度的成像序列，该成像序列是受激回波序列，其包括非共振Bloch-Siegert RF脉冲（ BS）在刺激回波序列的准备阶段（21）期间辐射。从获得的受激回波MR信号导出B1图。此外，本发明涉及一种MR成像方法，其中身体的一部分经受第一成像序列，该第一成像序列包括第一复合激励RF脉冲，该第一复合激励RF脉冲由具有基本相等的翻转角并且相位不同的两个RF脉冲分量组成基本上为90°。此外，身体的部分经受第二成像序列，其中从通过第一和第二成像序列获取的信号数据导出B1图。

4. 发明公开

EP2106556A1 DETERMINATION OF SUSCEPTIBILITY-INDUCED MAGNETIC FIELD GRADIENTS BY MAGNETIC RESONANCE 审中-公开
标题翻译：用磁共振法测定磁化率引起的磁场梯度
公开(公告)号：EP2106556A1
公开(公告)日：2009-10-07
申请号：EP08702424.6
申请日：2008-01-15
申请人： Koninklijke Philips Electronics N.V. , Philips Intellectual Property & Standards GmbH
发明人： DAHNKE, Hannes , SCHAEFFTER, Tobias , VAN DER MEULEN, Peter
IPC分类号： G01R33/28 , G01R33/48 , G01R33/3875
CPC分类号： G01R33/56536 , G01R33/243 , G01R33/281 , G01R33/286 , G01R33/3875 , G01R33/48 , G01R33/5601
摘要： The invention relates to a device for magnetic resonance imaging of a body (7). The device (1) comprises means (2) for establishing a substantially homogeneous main magnetic field in the examination volume, means (3, 4, 5) for generating switched magnetic field gradients superimposed upon the main magnetic field, means (6) for radiating RF pulses towards the body (7), control means (12) for controlling the generation of the magnetic field gradients and the RF pulses, means (10) for receiving and sampling magnetic resonance signals, and reconstruction means (14) for forming MR images from the signal samples. In accordance with the invention, the device is arranged to a) generate a series of MR echo signals (20) by subjecting at least a portion of the body (7) to an MR imaging sequence of RF pulses and switched magnetic field gradients, b) acquire the MR echo signals for reconstructing an MR image data set (21) therefrom, c) calculate a gradient map (22) by co mput ing echo shift parameters (SPx, SPy, SPz) from subsets of the MR image data set, the echo shift parameters (SPx, SPy, SPz) indicating magnetic field gradient induced shifts of the echo positions in k-space, wherein each subset comprises a number (n) of spatially adjacent pixel or voxel values of the MR image data set (21).
摘要翻译：本发明涉及用于身体（7）的磁共振成像的装置。装置（1）包括用于在检查体积中建立基本上均匀的主磁场的装置（2），用于产生叠加在主磁场上的开关磁场梯度的装置（3,4,5），用于辐射的装置（6）（7）的RF脉冲，用于控制磁场梯度和RF脉冲的产生的控制装置（12），用于接收和采样磁共振信号的装置（10），以及用于形成MR图像的重建装置（14）来自信号样本。根据本发明，该装置被配置为：a）通过使主体（7）的至少一部分经历RF脉冲和切换磁场梯度的MR成像序列来产生一系列MR回波信号（20），b ）从中获取用于重建MR图像数据集（21）的MR回波信号，c）通过从MR图像数据集的子集中输入回波偏移参数（SPx，SPy，SPz）来计算梯度图（22）指示k空间中回波位置的磁场梯度引起的移位的回波移位参数（SPx，SPy，SPz），其中每个子集包括MR图像数据集（21）的空间相邻像素或体素值的数量（n））。

5. 发明申请

WO2017080892A1 MAGNETIC RESONANCE EXAMINATION SYSTEM WITH A USER INTERFACE 审中-公开
标题翻译：具有用户界面的磁共振检查系统
公开(公告)号：WO2017080892A1
公开(公告)日：2017-05-18
申请号：PCT/EP2016/076470
申请日：2016-11-03
申请人： KONINKLIJKE PHILIPS N.V.
发明人： KAUFHOLZ, Paul, Augustinus, Peter , VAN MEEL, Marius, Johannes , SPRINGORUM, Rudolf, Theodoor , FURSTER, Willem, Christiaan, Constantijn , VAN DER MEULEN, Peter , VAN WIJK, Vincent, Paul, Quinten
IPC分类号： G01R33/54 , G06F19/00 , A61B5/00
CPC分类号： G01R33/546 , G01R33/543 , G06F19/00 , G16H50/20
摘要： A magnetic resonance examination system is disclosed that is provided with a graphical user interface and an (software) analysis module. The analysis module is configured to analyse examination information, notably a selected examination protocol, for actions to be taken by the operator, such connecting auxiliary equipment or radio frequency receiver coils to the magnetic resonance examination system. The analysis module supplies the actions to be taken to the (graphical) user interface at the proper instant before or during carrying-out the examination protocol. In this way the operator is guided and supported in the performance of the selected examination protocol. This improves the efficiency of workflow in performing one or more selected protocols. Preferably, the graphical user interface is provided inside the examination room and may be mounted on the gantry.
摘要翻译：公开了一种磁共振检查系统，其配备有图形用户界面和（软件）分析模块。分析模块被配置为分析检查信息，尤其是选择的检查协议，用于操作员要采取的动作，例如将辅助设备或射频接收器线圈连接到磁共振检查系统。分析模块在执行检查协议之前或期间的恰当时刻将要采取的动作提供给（图形）用户界面。通过这种方式，指导和支持操作人员执行选定的检查协议。这提高了执行一个或多个选定协议的工作流程的效率。优选地，图形用户界面被提供在检查室内并且可以被安装在门架上。

6. 发明公开

EP3531160A1 EDDY CURRENT CORRECTION IN MR SPECTROSCOPY 审中-公开
公开(公告)号：EP3531160A1
公开(公告)日：2019-08-28
申请号：EP18158080.4
申请日：2018-02-22
申请人： Koninklijke Philips N.V.
发明人： VAN DER MEULEN, Peter
IPC分类号： G01R33/565 , G01R33/485
摘要： The invention relates to a method of MR imaging or MR spectroscopy of an object. It is an object of the invention to improve the suppression of magnetic field gradient switching-induced sidebands. The method of the invention comprises the steps of:
- subjecting the object (10) to a first measurement sequence comprising at least one RF excitation pulse and a number of switched magnetic field gradients;
- acquiring first MR signals;
- subjecting the object (10) to a second measurement sequence identical to the first measurement sequence, with the difference that at least some of the switched magnetic field gradients of the second measurement sequence have the opposite polarity of the corresponding switched magnetic field gradients of the first measurement sequence,
- acquiring second MR signals;
- repeating the succession of steps a) through d) a number of times, wherein the acquired first and second MR signals are superposed to obtain averaged MR signals; and
- reconstructing an MR image from the averaged MR signals and/or deriving an MR spectrum from the averaged MR signals. Moreover, the invention relates to a MR device (1) and to a computer program for a MR device (1).

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