公开(公告)号：US20090267601A1

公开(公告)日：2009-10-29

申请号：US11718451

申请日：2005-10-31

申请人： Marinus Johannes Adrianus Maria Van Helvoort ,  Filips Van Liere ,  Lambertus De Vries ,  Johannes Hendrik Den Boef ,  Marcellus Hendricus Marinus Waltherus Melters ,  Cornelis Leonardus Gerardus Ham ,  Marc Saes

发明人： Marinus Johannes Adrianus Maria Van Helvoort ,  Filips Van Liere ,  Lambertus De Vries ,  Johannes Hendrik Den Boef ,  Marcellus Hendricus Marinus Waltherus Melters ,  Cornelis Leonardus Gerardus Ham ,  Marc Saes

IPC分类号： G01R33/48

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) placed in a stationary and substantially homogeneous main magnetic field comprising a main magnet (2) for generation of a stationary and substantially homogeneous main magnetic field within the examination zone. In order to provide an MR device (1) which is arranged to allow for massive parallel imaging without extensive cabling between the individual receiving coils and the back end electronics, the invention proposes to make provision for a plurality of receiving units (10a, 10b, 10c) placed in or near the examination zone, which receiving units (10a, 10b, 10c) each comprise a receiving antenna (12a, 12b, 12c) for receiving MR signals from the body, a digitizing means (21a, 21b, 21c) for sampling the received MR signals and for transforming the signal samples into digital signals, and a transmitter (22a, 22b, 22c) for transmitting the digital signals to a central processing unit (13). Further, the device (1) comprises synchronization means (17) for synchronizing the operation of the individual digitizing means (21a, 21b, 21c) of the receiving units (10a, 10b, 10c).

摘要翻译： 本发明涉及一种用于磁体共振成像的装置（1），其放置在静止且基本上均匀的主磁场中，该主磁场包括主磁体（2），用于在检查期间产生静止且基本均匀的主磁场 区。 为了提供一种MR器件（1），其被布置成允许在各个接收线圈和后端电子器件之间没有广泛布线的巨大的并行成像，本发明提出为多个接收单元（10a，10b， 10c），其中接收单元（10a，10b，10c）各自包括用于从身体接收MR信号的接收天线（12a，12b，12c），数字化装置（21a，21b，21c） 用于对所接收的MR信号进行采样并将信号样本变换为数字信号;以及用于将数字信号发送到中央处理单元（13）的发射器（22a，22b，22c）。 此外，装置（1）包括用于使接收单元（10a，10b，10c）的各个数字化装置（21a，21b，21c）的操作同步的同步装置（17）。

公开(公告)号：US07750635B2

公开(公告)日：2010-07-06

申请号：US11718451

申请日：2005-10-31

申请人： Marinus Johannes Adrianus Maria Van Helvoort ,  Filips Van Liere ,  Lambertus De Vries ,  Johannes Hendrik Den Boef ,  Marcellus Hendricus Marinus Waltherus Melters ,  Cornelis Leonardus Gerardus Ham ,  Marc Saes

发明人： Marinus Johannes Adrianus Maria Van Helvoort ,  Filips Van Liere ,  Lambertus De Vries ,  Johannes Hendrik Den Boef ,  Marcellus Hendricus Marinus Waltherus Melters ,  Cornelis Leonardus Gerardus Ham ,  Marc Saes

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) placed in a stationary and substantially homogeneous main magnetic field comprising a main magnet (2) for generation of a stationary and substantially homogeneous main magnetic field within the examination zone. In order to provide an MR device (1) which is arranged to allow for massive parallel imaging without extensive cabling between the individual receiving coils and the back end electronics, the invention proposes to make provision for a plurality of receiving units (10a, 10b, 10c) placed in or near the examination zone, which receiving units (10a, 10b, 10c) each comprise a receiving antenna (12a, 12b, 12c) for receiving MR signals from the body, a digitizing means (21a, 21b, 21c) for sampling the received MR signals and for transforming the signal samples into digital signals, and a transmitter (22a, 22b, 22c) for transmitting the digital signals to a central processing unit (13). Further, the device (1) comprises synchronization means (17) for synchronizing the operation of the individual digitizing means (21a, 21b, 21c) of the receiving units (10a, 10b, 10c).

摘要翻译： 本发明涉及一种用于磁体共振成像的装置（1），其放置在静止且基本上均匀的主磁场中，该主磁场包括主磁体（2），用于在检查期间产生静止且基本均匀的主磁场 区。 为了提供一种MR器件（1），其被布置成允许在各个接收线圈和后端电子器件之间没有广泛布线的巨大的并行成像，本发明提出为多个接收单元（10a，10b， 10c），其中接收单元（10a，10b，10c）各自包括用于从身体接收MR信号的接收天线（12a，12b，12c），数字化装置（21a，21b，21c） 用于对所接收的MR信号进行采样并将信号样本变换为数字信号;以及用于将数字信号发送到中央处理单元（13）的发射器（22a，22b，22c）。 此外，装置（1）包括用于使接收单元（10a，10b，10c）的各个数字化装置（21a，21b，21c）的操作同步的同步装置（17）。

公开(公告)号：US06759846B2

公开(公告)日：2004-07-06

申请号：US10243055

申请日：2002-09-13

申请人： Marinus Johannes Adrianus Maria Van Helvoort ,  Johan Samuel Van Den Brink ,  Diana Maria Francisca Geraats ,  Paulus Cornelius Hendrikus Adrianus Haans ,  Cornelis Leonardus Gerardus Ham

发明人： Marinus Johannes Adrianus Maria Van Helvoort ,  Johan Samuel Van Den Brink ,  Diana Maria Francisca Geraats ,  Paulus Cornelius Hendrikus Adrianus Haans ,  Cornelis Leonardus Gerardus Ham

IPC分类号： G01V300

CPC分类号： G01R33/3415 ,  G01R33/3657 ,  G01R33/3664 ,  G01R33/3685

摘要： The invention relates to an MR coil module for use in an MR imaging system for receiving and/or transmitting RF signals. In order to provide an MR coil module which allows a modular and user definable configuration of an RF coil system and which provides a high SENSE factor (>2), the MR coil module according to the invention comprises: at least two coil elements (21-26) positioned next to each other, a preamplifier (51-56) for each coil element (21-26), a signal bus (40) for transferring RF signals between said coil elements (21-26), an output means (10) and an input means (9), an output means (10) for outputting RF signals from the MR coil module (1), an input means (9) for inputting RF signals into the MR coil module (1), switching means (6) for switching the connections between said coil elements (21-26), said input means (9) and said output means (10), wherein said output means (10) and said input means (9) are adapted complementary so as to enable electrical and mechanical connection of the module (1) to other modules.

摘要翻译： 本发明涉及用于MR成像系统中用于接收和/或发射RF信号的MR线圈模块。 为了提供允许RF线圈系统的模块化和用户可定义配置并且提供高SENSE因子（> 2）的MR线圈模块，根据本发明的MR线圈模块包括：至少两个线圈元件（21 -26），用于每个线圈元件（21-26）的前置放大器（51-56），用于在所述线圈元件（21-26）之间传送RF信号的信号总线（40），输出装置 10）和输入装置（9），用于从MR线圈模块（1）输出RF信号的输出装置（10），用于将RF信号输入到MR线圈模块（1）中的输入装置（9），切换装置 （6），用于切换所述线圈元件（21-26），所述输入装置（9）和所述输出装置（10）之间的连接，其中所述输出装置（10）和所述输入装置（9） 以实现模块（1）与其他模块的电气和机械连接。

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。

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。

公开(公告)号：US09417301B2

公开(公告)日：2016-08-16

申请号：US13816512

申请日：2011-08-19

申请人： Cornelis Leonardus Gerardus Ham ,  Gerardus Bernardus Jozef Mulder

发明人： Cornelis Leonardus Gerardus Ham ,  Gerardus Bernardus Jozef Mulder

IPC分类号： G01V3/00 ,  G01R33/422 ,  C25D15/00 ,  G01R33/565

CPC分类号： G01R33/422 ,  C25D15/00 ,  G01R33/56518

摘要： The invention relates to a magnetic resonance imaging system (1) comprising: a main magnet (2) for generating a uniform, steady magnetic field within an examination volume, at least one RF antenna (9) for transmitting RF pulses to the examination volume for magnetic resonance spin excitation, a gradient coil unit comprising gradient coils (4, 5, 6) for generating gradient magnetic fields in the examination volume (100), an RF shield (104) disposed between said RF antenna (9) and said gradient coils (4, 5, 6), said RF shield (104) comprising a shielding material adapted for suppressing Eddy currents induced in the shield by said gradient magnetic fields and for screening RF fields towards the gradient coils (4, 5, 6), said RF fields being generated by the RF antenna (9), wherein the RF shield comprises a conductive coating (104, 110) as shielding material.

摘要翻译： 本发明涉及一种磁共振成像系统（1），包括：用于在检查体积内产生均匀的稳定磁场的主磁体（2），用于将RF脉冲发送到检查体积的至少一个RF天线（9），用于 磁共振自旋激励，梯度线圈单元，包括用于在检查体积（100）中产生梯度磁场的梯度线圈（4,5,6）; RF屏蔽（104），设置在所述RF天线（9）和所述梯度线圈 （4,6,6），所述RF屏蔽（104）包括屏蔽材料，所述屏蔽材料适于抑制所述屏蔽体中由所述梯度磁场感应的涡流，并用于屏蔽朝向所述梯度线圈（4,5,6）的RF场，所述屏蔽材料 RF场由RF天线（9）产生，其中RF屏蔽包括作为屏蔽材料的导电涂层（104,110）。

公开(公告)号：US20090209842A1

公开(公告)日：2009-08-20

申请号：US12307623

申请日：2007-07-03

申请人： Adrianus Hendrikus Koevoets ,  Georgo Zorz Angelis ,  Nicolaas Bernardus Roozen ,  Gerardus Nerius Peeren ,  Cornelis Leonardus Gerardus Ham

发明人： Adrianus Hendrikus Koevoets ,  Georgo Zorz Angelis ,  Nicolaas Bernardus Roozen ,  Gerardus Nerius Peeren ,  Cornelis Leonardus Gerardus Ham

IPC分类号： A61B5/055

CPC分类号： G01R33/3854 ,  G01R33/4215

摘要： The invention relates to a magnetic resonance imaging system which comprises means for generating a static magnetic field and a gradient coils system for generating a time varying magnetic gradient field by use of a first electrical current and a second electrical current. The gradient coils system is located in the magnetic field and the gradient coils system has a plurality of vibrational modes. Lorentz forces are generated due to the interaction of the first and/or second electrical currents with the superposition of the static magnetic field and the magnetic gradient field. The gradient coils system and/or the first electrical current are adapted so that the integral of the in-products of said Lorentz forces and a vibrational mode of said plurality of vibrational modes is at a value close to zero, wherein said in-products are determined for all points of the gradient coils system, and wherein the integral is determined by summing the in-products determined for all the points. As the above mentioned integral is close to zero or preferably zero, the Lorentz forces are not able to excite the vibrational mode (for example the lowest order bending mode) of the gradient coils system. Thus acoustical noise that is generated by a vibrating gradient coils system is reduced and the comfort for a patient that is examined by the magnetic resonance imaging system is therefore enhanced.

摘要翻译： 本发明涉及一种磁共振成像系统，其包括用于产生静态磁场的装置和用于通过使用第一电流和第二电流产生时变磁梯度场的梯度线圈系统。 梯度线圈系统位于磁场中，梯度线圈系统具有多个振动模式。 由于第一和/或第二电流与静磁场和磁梯度场的叠加相互作用，产生洛伦兹力。 梯度线圈系统和/或第一电流被调整为使得所述洛伦兹力的所述产物和所述多个振动模式的振动模式的积分值接近于零，其中所述产品是 对于梯度线圈系统的所有点确定，并且其中通过对所有点确定的产品求和来确定积分。 由于上述积分值接近零或优选为零，所以洛伦兹力不能激发梯度线圈系统的振动模式（例如最低阶弯曲模式）。 因此，由振动梯度线圈系统产生的声学噪声减小，并且因此增强了由磁共振成像系统检查的患者的舒适度。

公开(公告)号：US20080262340A1

公开(公告)日：2008-10-23

申请号：US11569069

申请日：2005-05-12

申请人： Cornelis Leonardus Gerardus Ham ,  Miha Fuderer ,  Johan Samuel Van Den Brink

发明人： Cornelis Leonardus Gerardus Ham ,  Miha Fuderer ,  Johan Samuel Van Den Brink

IPC分类号： A61B5/055 ,  G01R33/563

CPC分类号： G01R33/56375

摘要： The invention relates to a MRI system and to a method for producing an image with such an system. In order to provide a MR imaging technique with a high efficient MR signal acquisition, which provides a high level of comfort to a patient, a MRI system and method are suggested, where image data from an object are acquired while the object is moving with variable speed relative to the MRI system, and where the image data are combined and an image of the object is reconstructed.

摘要翻译： 本发明涉及一种MRI系统和一种用这种系统生产图像的方法。 为了提供具有高效MR信号采集的MR成像技术，其为患者提供高水平的舒适性，建议了MRI系统和方法，其中在物体运动时获取来自对象的图像数据， 相对于MRI系统的速度，并且其中图像数据被组合并且重建对象的图像。

公开(公告)号：US07193416B2

公开(公告)日：2007-03-20

申请号：US10498198

申请日：2002-11-20

申请人： Paul Royston Harvey ,  Johannes Adrianus Overweg ,  Cornelis Leonardus Gerardus Ham ,  Nicolaas Bernardus Roozen ,  Patrick Willem Paul Limpens

发明人： Paul Royston Harvey ,  Johannes Adrianus Overweg ,  Cornelis Leonardus Gerardus Ham ,  Nicolaas Bernardus Roozen ,  Patrick Willem Paul Limpens

IPC分类号： G01V3/00

CPC分类号： G01R33/3806 ,  G01R33/385 ,  G01R33/3856

摘要： The invention relates to an open magnetic resonance imaging (MRI) magnet system (1) for use in a medical imaging system. The open MRI magnet system has two main coil units which are accomodated, at some distance from each other, in a first housing (2) and in a second housing (3), respectively. Between the two housings, an imaging volume (6) is present wherein a patient to be examined is placed. A gradient coil unit (9, 10) facing the imaging volume is present near a side of each of the two housings. Functional connections of the gradient coil units (9, 10), such as electrical power supply lines (13, 14) and cooling channels (15, 16) are provided in a central passage (4, 5) which is present in each of the two housings. As a result, these functional connections do not reduce the space in the imaging volume available for the patient. The central passages and the electrical power supply lines provided therein are parallel to the direction of the main magnetic field of the open MRI magnet system, so that the Lorentz forces exerted on the power lines are limited.

摘要翻译： 本发明涉及用于医学成像系统的开放磁共振成像（MRI）磁体系统（1）。 开放MRI磁体系统具有分别在第一壳体（2）和第二壳体（3）中彼此相隔一定距离的两个主线圈单元。 在两个壳体之间，存在成像体积（6），其中放置待检查的患者。 面对成像体积的梯度线圈单元（9,10）存在于两个壳体中的每一个的侧面附近。 梯形线圈单元（9,10）的功能连接，例如电力供应线（13,14）和冷却通道（15,16）设置在中央通道（4,5）中，中心通道（4,5）存在于 两个外壳。 因此，这些功能连接不会减少可用于患者的成像体积的空间。 设置在其中的中央通道和电源线平行于开放式MRI磁体系统的主磁场的方向，使得施加在电力线上的洛伦兹力受到限制。

公开(公告)号：US20100277174A1

公开(公告)日：2010-11-04

申请号：US12808399

申请日：2008-12-22

申请人： Johan Samuel Van Den Brink ,  Cornelis Leonardus Gerardus Ham

发明人： Johan Samuel Van Den Brink ,  Cornelis Leonardus Gerardus Ham

IPC分类号： G01R33/48

CPC分类号： G01R33/3873 ,  G01R33/34007 ,  G01R33/341 ,  G01R33/3415 ,  G01R33/5659

摘要： A magnetic resonance imaging system (10) includes a local coil (40) for receiving a resonance signal induced by a whole body quadrature coil (32). The local coil (40) includes a dielectric former (68) in which a plurality of receive coils (60, 74, 76, 78) and a passive B0 and B1 field shim (62, 82) are mounted. The passive shim includes a plurality of capacitively coupled elements (64) of an electrically conductive diamagnetic, paramagnetic, ferromagnetic material which passively shield and enhance the field in local regions. A surface configuration of the elements is tailored to optimize local B1 homogeneity and a mass of the elements is configured to optimize local B0 field homogeneity.

摘要翻译： 磁共振成像系统（10）包括用于接收由全身正交线圈（32）感应的谐振信号的局部线圈（40）。 局部线圈（40）包括电介质成形器（68），其中安装有多个接收线圈（60,74,76,78）和无源B0和B1场垫片（62,82）。 被动垫片包括多个电容耦合元件（64），其导电的抗磁性，顺磁性的铁磁材料被动地屏蔽和增强局部区域中的场。 元件的表面配置被定制以优化局部B1均匀性，并且元件的质量被配置为优化局部B0场均匀性。