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1. 发明申请

WO2005111649A1 MOVING TABLE MRI 审中-公开
标题翻译：移动表MRI
公开(公告)号：WO2005111649A1
公开(公告)日：2005-11-24
申请号：PCT/IB2005/051559
申请日：2005-05-12
申请人： KONINKLIJKE PHILIPS ELECTRONICS N.V. , HAM, Cornelis, L., G. , FUDERER, Miha , VAN DEN BRINK, Johan, S.
发明人： HAM, Cornelis, L., G. , FUDERER, Miha , VAN DEN BRINK, Johan, S.
IPC分类号： 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，其为患者提供了高水平的舒适性，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。

2. 发明申请

WO2004053514A1 MAGNETIC RESONANCE IMAGING SYSTEM WITH A PLURALITY OF TRANSMIT COILS 审中-公开
标题翻译：具有多重发射线圈的磁共振成像系统
公开(公告)号：WO2004053514A1
公开(公告)日：2004-06-24
申请号：PCT/IB2003/005015
申请日：2003-11-04
申请人： KONINKLIJKE PHILIPS ELECTRONICS N.V. , HAM, Cornelis, L., G. , FUDERER, Miha
发明人： HAM, Cornelis, L., G. , FUDERER, Miha
IPC分类号： G01R33/36
CPC分类号： G01R33/5659 , G01R33/246 , G01R33/3415 , G01R33/5612
摘要： The invention relates to an MRI system (1) for nuclear magnetic resonance imaging which comprises a plurality of transmit coils (11, 12). Each coil receives a coil drive signal (SD1, SD2). The respective coil drive signals have the same shape, but may have a different amplitude and phase, controlled by a controller (103) on the basis of characteristic information in a memory (104) as well as user input information. The controller is designed to set the respective amplitudes and phases in such a way that the resultant overall B1 field is as homogeneous as possible in a volume of interest.
摘要翻译：本发明涉及用于核磁共振成像的MRI系统（1），其包括多个发射线圈（11,12）。每个线圈接收线圈驱动信号（SD1，SD2）。相应的线圈驱动信号具有相同的形状，但是可以具有不同的幅度和相位，其基于存储器（104）中的特征信息以及用户输入信息由控制器（103）控制。控制器设计成以相应的方式设置相应的幅度和相位，使得所得到的总体B1场在感兴趣的体积中尽可能均匀。

3. 发明申请

WO2006120594A1 DETUNING OF AN RF SHIELDED MRI SCAN ROOM 审中-公开
标题翻译：射频屏蔽MRI扫描室的解除
公开(公告)号：WO2006120594A1
公开(公告)日：2006-11-16
申请号：PCT/IB2006/051331
申请日：2006-04-28
申请人： KONINKLIJKE PHILIPS ELECTRONICS N.V. , HAM, Cornelis, L., G. , FUDERER, Miha , VRINTEN, Marinus, L., A.
发明人： HAM, Cornelis, L., G. , FUDERER, Miha , VRINTEN, Marinus, L., A.
IPC分类号： G01R33/38 , G01R33/36
CPC分类号： G01R33/422 , G01R33/36 , G01R33/3628 , G01R33/3806
摘要： The present invention relates to a system and method magnetic resonance (MR) imaging. Furthermore the invention relates to the use of a material and to a computer program. In order to provide a technique which allows to prevent standing waves in an RF cage (3) of a MR imaging system (1) in a very cheap and simple way a MR imaging system (1) is suggested, which comprises a MR imaging apparatus (2) comprising an open magnet system (7), wherein operation of the MR imaging apparatus (2) creates a magnetic resonance field having a MR frequency, and which further comprises an RF cage (3), configured to enclose the MR imaging apparatus (2), wherein the walls (6) of the RF cage (3) are at least partly provided with a covering (5, 10), said covering (5, 10) is adapted in a way that the wavelength of the MR frequency within the covering (5, 10) is reduced.
摘要翻译：本发明涉及一种系统和方法磁共振（MR）成像。此外，本发明涉及材料和计算机程序的使用。为了提供允许以非常便宜和简单的方式在MR成像系统（1）的RF笼（3）中防止驻波的技术，建议MR成像系统（1），其包括MR成像装置（2），其包括开放磁体系统（7），其中所述MR成像装置（2）的操作产生具有MR频率的磁共振场，并且还包括RF笼（3），其被配置为包围所述MR成像装置（2），其中所述RF笼（3）的壁（6）至少部分地设置有覆盖物（5,10），所述覆盖物（5,10）以使得MR频率的波长在覆盖物（5,10）内减少。

4. 发明申请

WO2004070412A1 COMPENSATION OF MAGNETIC FIELD DISTURBANCES DUE TO VIBRATIONS IN AN MRI SYSTEM 审中-公开
标题翻译： MRI系统振动造成的磁场干扰的补偿
公开(公告)号：WO2004070412A1
公开(公告)日：2004-08-19
申请号：PCT/IB2004/050061
申请日：2004-01-29
申请人： KONINKLIJKE PHILIPS ELECTRONICS N.V. , HAM, Cornelis, L., G. , MENS, Wilhelmus, R., M. , GROEN, Johannes, P.
发明人： HAM, Cornelis, L., G. , MENS, Wilhelmus, R., M. , GROEN, Johannes, P.
IPC分类号： G01R33/385
CPC分类号： G01R33/3854
摘要： The invention relates to a magnetic resonance imaging (MRI) system comprising an examination volume (9), a main magnet system (17) for generating a main magnetic field (B o ) 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. According to the invention, 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, the invention provides an accurate and reliable compensation for said disturbances, so that artifacts and other distortions of the reconstructed image caused by said disturbances are considerably reduced.
摘要翻译：本发明涉及一种磁共振成像（MRI）系统，包括检查体积（9），用于在检查体积中产生主磁场（Bo）的主磁体系统（17），梯度磁体系统（25）主磁场的梯度，以及用于补偿由MRI系统的机械振动引起的磁场干扰的控制系统（37）。根据本发明，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改变电流和由此引起的涡流引起的，所以本发明为所述扰动提供了精确和可靠的补偿，使得重建图像的伪像和其它失真所造成的干扰大大减少。

5. 发明申请

WO2003096029A2 A MAGNETIC RESONANCE IMAGING (MRI) SYSTEM COMPRISING ACOUSTIC RESONATORS 审中-公开
标题翻译：包含声学谐振器的磁共振成像（MRI）系统
公开(公告)号：WO2003096029A2
公开(公告)日：2003-11-20
申请号：PCT/IB2003/001494
申请日：2003-04-11
申请人： KONINKLIJKE PHILIPS ELECTRONICS N.V. , ROOZEN, Nicolaas, B. , LA GRANGE, Martijn, R. , HARVEY, Paul, R. , LIMPENS, Patrick, W., P. , HAM, Cornelis, L., G.
发明人： ROOZEN, Nicolaas, B. , LA GRANGE, Martijn, R. , HARVEY, Paul, R. , LIMPENS, Patrick, W., P. , HAM, Cornelis, L., G.
IPC分类号： G01R
CPC分类号： G01R33/3854
摘要： The invention relates to a magnetic resonance imaging (MRI) system (1) comprising an examination volume (11), a main magnet system (17) for generating a magnetic field (B0) in the examination volume, and a gradient magnet system (25) for generating altering gradients of the magnetic field in the examination volume. The gradient magnet system is accommodated in a housing (31) having a main wall (33) facing the examination volume and a substantially conical wall (35) facing away from the examination volume. The main wall and the conical wall enclose a substantially angular tip portion (47) of the housing. In order to limit the level of the acoustic vibrations in and around the MRI system (1) caused by mechanical vibrations of the angular tip portion (47), the MRI system comprises a plurality of acoustic resonators (55) which each comprise an elongate resonance volume (57) with an open end (59) and a closed end (61) and a length (L) between the open end and the closed end. The open ends of the resonators are arranged near the angular tip portion, and the length of the resonators is substantially equal to 0,25k*(, wherein k = 1, 3, 5, 7, ... , and wherein ( is the wavelength of an acoustic wave caused by mechanical vibrations of the angular tip portion. The resonators have the acoustic property of neutralizing acoustic waves having said wavelength (. Preferably, the length of the resonators is tuned to at least one of the wavelengths corresponding to the mechanical resonance frequencies of the vibrating angular tip portion, as the acoustic waves originating from the vibrations at these resonance frequencies constitute a main portion of the overall acoustic level of the MRI system.
摘要翻译：本发明涉及一种磁共振成像（MRI）系统（1），包括检查体积（11），用于在检查体积中产生磁场（B0）的主磁体系统（17）和梯度磁体系统（25 ）用于在检查体积中产生磁场的改变梯度。倾斜磁体系统容纳在具有面向检查体积的主壁（33）的壳体（31）中，以及背离检查体积的基本上圆锥形的壁（35）。主壁和锥形壁围绕壳体的基本角度的尖端部分（47）。为了限制由角尖端部分（47）的机械振动引起的MRI系统（1）内和周围的声振动的水平，MRI系统包括多个声谐振器（55），每个声谐振器包括细长共振在开口端和封闭端之间具有开口端（59）和封闭端（61）和长度（L）的容积（57）。谐振器的开放端设置在角尖端附近，谐振器的长度基本上等于0.25k *（其中k = 1,3,5,7，...，其中（是谐振器具有具有所述波长的中和声波的声学特性（优选地，谐振器的长度被调谐到与机械的对应的波长中的至少一个波长振动角尖端部分的谐振频率，作为源自这些谐振频率处的振动的声波构成MRI系统的整体声级的主要部分。

6. 发明申请

WO2003050555A1 OPEN MAGNETIC RESONANCE IMAGING (MRI) MAGNET SYSTEM 审中-公开
标题翻译：开放磁共振成像（MRI）磁体系统
公开(公告)号：WO2003050555A1
公开(公告)日：2003-06-19
申请号：PCT/IB2002/004911
申请日：2002-11-20
申请人： KONINKLIJKE PHILIPS ELECTRONICS N.V. , HARVEY, Paul, R. , OVERWEG, Johannes, A. , HAM, Cornelis, L., G. , ROOZEN, Nicolaas, B. , LIMPENS, Patrick, W., P.
发明人： HARVEY, Paul, R. , OVERWEG, Johannes, A. , HAM, Cornelis, L., G. , ROOZEN, Nicolaas, B. , LIMPENS, Patrick, W., P.
IPC分类号： G01R33/38
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。

7. 发明申请

WO2006067682A2 MAGNETIC RESONANCE DEVICE AND METHOD 审中-公开
标题翻译：磁共振装置和方法
公开(公告)号：WO2006067682A2
公开(公告)日：2006-06-29
申请号：PCT/IB2005/054230
申请日：2005-12-14
申请人： KONINKLIJKE PHILIPS ELECTRONICS N.V. , VAN HELVOORT, Marinus, J., A., M. , GROEN, Johannes, P. , KLEIHORST, Robert, P. , HAM, Cornelis, L., G.
发明人： VAN HELVOORT, Marinus, J., A., M. , GROEN, Johannes, P. , KLEIHORST, Robert, P. , HAM, Cornelis, L., G.
IPC分类号： G01R33/36 , G01R33/3415
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）的磁共振成像的设备（1），其包括用于在检查区域内产生静止且基本上均匀的主磁场的主磁体（2），放置在检查区域内或附近的多个无线接收单元（10a，10b），以及以可变采样频率工作的采样装置（21a，21b），用于采样所接收的MR信号并将它们转换成数字信号采样。为了提供MR设备（1），该MR设备（1）被布置为在不干扰被检查对象（7）的核自旋系统的情况下感应激励无线接收单元（10a，10b），并且不需要庞大的能量存储装置为了无线接收单元（10a，10b）的操作，本发明提出为在无线接收单元（10a，10b）上感应供电的检测区域内的激励装置（17）产生RF激励场，其中RF激励场的频率是采样频率的整数倍。

8. 发明申请

WO2005043181A1 SHIELDED TREATMENT ROOM AND DEVICE SUITABLE FOR RECORDING IMAGES ON THE BASIS OF MAGNETIC RESONANCE 审中-公开
标题翻译：屏蔽处理室和适用于记录基于磁共振的图像的装置
公开(公告)号：WO2005043181A1
公开(公告)日：2005-05-12
申请号：PCT/IB2004/052177
申请日：2004-10-22
申请人： KONINKLIJKE PHILIPS ELECTRONICS N.V. , VRINTEN, Marinus, L., A. , HAM, Cornelis, L., G. , KLEIHORST, Robert, P. , MULDER, Gerardus, B., J. , HAANS, Paulus, C., H., A.
发明人： VRINTEN, Marinus, L., A. , HAM, Cornelis, L., G. , KLEIHORST, Robert, P. , MULDER, Gerardus, B., J. , HAANS, Paulus, C., H., A.
IPC分类号： G01R33/28
CPC分类号： G01R33/28 , G01R33/3806 , G01R33/422
摘要： The invention relates to a treatment room (7) suitable for recording images of a human or animal body on the basis of a magnetic resonance (MR) imaging technique, the walls (7a), the ceiling (7b) and the floor (7c) of the treatment room forming an electromagnetic shield for a magnetic resonance (MR) imaging system (1) arranged in the treatment room, which MR imaging system comprises at least a target area (5) in which a human or animal body can be placed, a housing (2, 3, 4) comprising at least one main magnetic unit and at least one gradient magnetic unit for generating one or more magnetic fields in the target area (5), and at least one radio-frequency (RF) pulse unit (6) for generating an electromagnetic RF pulse in the target area (5). The invention further relates to a magnetic resonance imaging system comprising a target area in which a human or animal body can be placed, a housing comprising at least one main magnetic unit and at least one gradient magnetic unit for generating one or more magnetic fields in the target area, and at least one radio-frequency (RF) pulse unit for generating an electromagnetic RF pulse in the target area. In accordance with the invention, means (10, 11, 12, 13, 14, 15, 16, 17) are present which, in operation, counteract the electromagnetic effects (8) of the RF pulse in the treatment room (7) outside the target area (5).
摘要翻译：本发明涉及适于基于磁共振（MR）成像技术记录人体或动物体的图像的治疗室（7），壁（7a），天花板（7b）和地板（7c）所述治疗室形成用于设置在所述治疗室中的磁共振（MR）成像系统（1）的电磁屏蔽，所述MR成像系统至少包括其中可以放置人或动物体的目标区域（5）包括至少一个主磁单元和用于在所述目标区域（5）中产生一个或多个磁场）的至少一个梯度磁单元的壳体（2,3,4）以及至少一个射频（RF）脉冲单元（6），用于在目标区域（5）中产生电磁RF脉冲。本发明还涉及一种磁共振成像系统，其包括其中可以放置人或动物体的目标区域，包括至少一个主磁单元和至少一个梯度磁单元的壳体，用于在该区域中产生一个或多个磁场目标区域和用于在目标区域中产生电磁RF脉冲的至少一个射频（RF）脉冲单元。根据本发明，存在装置（10,11,12,13,14,15,16,17），其在操作中抵消外部处理室（7）中的RF脉冲的电磁效应（8）目标区域（5）。

9. 发明申请

WO2004046744A1 MRI SYSTEM HAVING A GRADIENT MAGNET SYSTEM WITH A BALANCE MEMBER 审中-公开
标题翻译：具有平衡成员的梯度磁体系统的MRI系统
公开(公告)号：WO2004046744A1
公开(公告)日：2004-06-03
申请号：PCT/IB2003/004816
申请日：2003-10-27
申请人： KONINKLIJKE PHILIPS ELECTRONICS N.V. , ROOZEN, Nicolaas, B. , HAM, Cornelis, L., G. , HARVEY, Paul, R. , LIMPENS, Patrick, W., P.
发明人： ROOZEN, Nicolaas, B. , HAM, Cornelis, L., G. , HARVEY, Paul, R. , LIMPENS, Patrick, W., P.
IPC分类号： G01R33/385
CPC分类号： G01R33/3854
摘要： The invention relates to a magnetic resonance imaging (MRI) system (1) comprising an examination volume (11), a main magnet system (13) for generating a main magnetic field (B 0 ) in the examination volume in a Z-direction, a gradient magnet system (19) for generating gradients of the main magnetic field, and an anti-vibration system (33) for reducing vibrations of the gradient magnet system caused by a mechanical load (M X , M Y ) exerted on the gradient magnet system as a result of electromagnetic interaction between the main magnetic field and electrical currents in the gradient magnet system. According to the invention the anti-vibration system (33) comprises a balance member (39), which is coupled to the gradient magnet system (19) by means of an actuator system (51) and a coupling device (49) allowing displacements of the balance member relative to the gradient magnet system. The MRI system (1) also has a control system (81) which controls the actuator system in such a manner that the actuator system exerts upon the balance member a compensating mechanical load (M CX , M CY ) which substantially corresponds to the mechanical load (M X , M Y ) exerted on the gradient magnet system. As a result, the actuator system exerts a mechanical reaction load (M RX , M RY ) on the gradient magnet system which has the same magnitude as but is oppositely directed to the mechanical load (M X , M Y ) exerted on the gradient magnet system, so that vibrations of the gradient magnet system are effectively limited.
摘要翻译：本发明涉及一种磁共振成像（MRI）系统（1），包括检查体积（11），主磁体系统（13），用于在Z轴中产生检查体积中的主磁场（B> 0 < 方向，用于产生主磁场梯度的梯度磁体系统（19）和用于减少由机械载荷引起的梯度磁体系统振动的防振系统（33）（M> X < ）作为梯度磁体系统中的主磁场和电流之间的电磁相互作用的结果施加在梯度磁体系统上。根据本发明，防振系统（33）包括平衡构件（39），其通过致动器系统（51）和耦合装置（49）耦合到梯度磁体系统（19），耦合装置（49）允许位移平衡构件相对于梯度磁体系统。 MRI系统（1）还具有控制系统（81），该控制系统（81）控制致动器系统，使得致动器系统在平衡构件上施加补偿机械载荷（M> CX <，M> CY < 到施加在梯度磁体系统上的机械载荷（M> X <，M> Y <）。因此，致动器系统在梯度磁体系统上施加机械反作用力（M> RX <，M> RY <），其具有与机械载荷相同而相反的机械载荷（M> X，M> Y <）施加在梯度磁体系上，从而有效地限制了梯度磁体系的振动。

10. 发明申请

WO2003046597A1 MAGNETIC RESONANCE IMAGING METHOD WITH REDUCED ACOUSTIC NOISE 审中-公开
标题翻译：具有减少声音噪声的磁共振成像方法
公开(公告)号：WO2003046597A1
公开(公告)日：2003-06-05
申请号：PCT/IB2002/004871
申请日：2002-11-20
申请人： KONINKLIJKE PHILIPS ELECTRONICS N.V. , HAM, Cornelis, L., G. , HARVEY, Paul, R.
发明人： HAM, Cornelis, L., G. , HARVEY, Paul, R.
IPC分类号： G01R33/385
CPC分类号： G01R33/3854 , G01R33/3415 , G01R33/5611
摘要： A magnetic resonance imaging method comprises application of a pulse sequence which includes one or more pulses. The pulse sequence having an intrinsic scan time based on a full sampling rate in k-space for a predetermined full ' field-of-view' and a reference temporal pulse shape of the magnetic gradient pulses. A series of magnetic resonance signals is acquired by means of a receiver antennae system having a spatial sensitivity profile. Undersampled signal acquisition is applied to acquire undersampled magnetic resonance signals at a predetermined reduced sampling rate in k-space, the sampling rate being reduced by a reduction factor relative the full sampling rate. The pulse sequence being is during an actual signal scan time is applied. The actual signal scan time being larger than the intrinsic signal scan time times the reduction factor. The undersampling allows a smaller acquisition rate of the magnetic resonance signals and smaller slew rates and amplitudes of the magnetic gradient pulses and lower peak RF-fields of the refocusing pulses. Hence, lower acoustic noise and lower specific absorption rate are achieved.
摘要翻译：磁共振成像方法包括施加包括一个或多个脉冲的脉冲序列。脉冲序列具有基于k空间中的预定全“视场”的全采样率的本征扫描时间和磁梯度脉冲的参考时间脉冲形状。通过具有空间灵敏度分布的接收机天线系统获得一系列磁共振信号。应用未采样信号采集以在k空间中以预定的降低的采样率获取欠采样的磁共振信号，采样速率相对于全采样率减小减小因子。脉冲序列是在实际的信号扫描时间期间。实际信号扫描时间大于固有信号扫描时间乘以缩小因子。欠采样允许较小的磁共振信号的采集速率和更小的转换速率和磁梯度脉冲的幅度以及重聚焦脉冲的较低峰值RF场。因此，实现了较低的声学噪声和较低的比吸收率。

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