公开(公告)号：WO2008104894A3

公开(公告)日：2009-01-08

申请号：PCT/IB2008050324

申请日：2008-01-30

Applicant: KONINKL PHILIPS ELECTRONICS NV ,  ZHAI ZHIYONG ,  MORICH MICHAEL A ,  DEMEESTER GORDON D

Inventor： ZHAI ZHIYONG ,  MORICH MICHAEL A ,  DEMEESTER GORDON D

IPC: G01R33/34 ,  G01R33/36 ,  G01R33/422

CPC classification number: G01R33/34046 ,  G01R33/3635 ,  G01R33/422

Abstract: A radio frequency coil assembly includes an annular conductor (20, 22) configured to support a sinusoidal electrical current distribution at a magnetic resonance frequency, and a radio frequency shield (30, 32, 34) shielding the annular conductor in at least one direction, the radio frequency shield including at least one oi (i) a cylindrical shield portion (30) surrounding a perimeter of the annular conductor, and (ii) a planar shield portion (32, 34) arranged generally parallel with the annular conductor. In a magnetic resonance scanner embodiment, a magnet generates a static magnetic field (B0), a magnetic field gradient system is configured to superimpose selected magnetic field gradients on the static magnetic field, and said radio frequency coil assembly is arranged with the annular conductor generally transverse to the static magnetic field (B0).

Abstract translation: 射频线圈组件包括被配置为支撑磁共振频率的正弦电流分布的环形导体（20,22）和在至少一个方向上屏蔽环形导体的射频屏蔽（30,32,34） 所述射频屏蔽包括至少一个（i）围绕所述环形导体的周边的圆柱形屏蔽部分（30），以及（ii）大致平行于所述环形导体布置的平面屏蔽部分（32,34）。 在磁共振扫描器实施例中，磁体产生静磁场（B0），磁场梯度系统被配置为将选定的磁场梯度叠加在静磁场上，并且所述射频线圈组件与环形导体一般布置 横向静磁场（B0）。

公开(公告)号：WO2005043182A1

公开(公告)日：2005-05-12

申请号：PCT/IB2004/052020

申请日：2004-10-07

Applicant: KONINKLIJKE PHILIPS ELECTRONICS, N.V. ,  MORICH, Michael, A. ,  DEMEESTER, Gordon, D. ,  ZHAI, Zhiyong

Inventor： MORICH, Michael, A. ,  DEMEESTER, Gordon, D. ,  ZHAI, Zhiyong

IPC: G01R33/32

CPC classification number: G01R33/583 ,  G01R33/4835

Abstract: Multi-slice magnetic resonance imaging of a region of interest of an imaging subject (16) is performed using a radio frequency coil (40) arranged to generate a B 1 magnetic field in the region of interest. One or more processors (44, 82, 88, 110) determine a B1 field value for each slice that is representative of the B1 field over a selected area of the slice, accounting for subject effects on the BI field, and determine an adjusted per-slice radio frequency excitation for each slice that adjusts the B 1 field value for the slice to a selected value. A magnetic resonance imaging system (10, 44, 46, 50, 52) acquires magnetic resonance imaging data for each slice using the adjusted per-slice radio frequency excitation for that slice. A reconstruction processor (58) reconstructs the acquired magnetic resonance imaging data into a reconstructed image representation.

Abstract translation: 使用布置成在感兴趣区域中产生B1磁场的射频线圈（40）来执行成像对象（16）的感兴趣区域的多层磁共振成像。 一个或多个处理器（44,82,88,110）确定代表在片段的选定区域上的B1字段的每个片段的B1字段值，以考虑BI字段上的对象影响，并且确定每个 对于每个切片调整切片的B1字段值到选定值的-Sslice射频激励。 磁共振成像系统（10,44,46,50,52）使用针对该切片的调节的每切片射频激励获取每个切片的磁共振成像数据。 重建处理器（58）将所获取的磁共振成像数据重建为重建图像表示。

公开(公告)号：WO2007124245A1

公开(公告)日：2007-11-01

申请号：PCT/US2007/065841

申请日：2007-04-03

Applicant: KONINKLIJKE PHILIPS ELECTRONICS, N.V. ,  ZHAI, Zhiyong ,  DEMEESTER, Gordon, D. ,  MORICH, Michael, A. ,  HARVEY, Paul, R.

Inventor： ZHAI, Zhiyong ,  DEMEESTER, Gordon, D. ,  MORICH, Michael, A. ,  HARVEY, Paul, R.

IPC: G01R33/32

CPC classification number: G01R33/5659 ,  G01R33/246 ,  G01R33/3415

Abstract: In a magnetic resonance scanner, a main magnet (20, 22) generates a static magnetic field at least in an examination region. A magnetic field gradient system (30, 54) selectively superimposes magnetic field gradients on the static magnetic field at least in the examination region. A magnetic resonance excitation system (36, 36') includes at least one radio frequency coil (30, 301, 302, 303) arranged to inject radio frequency B1 fields into the examination region and at least two radio frequency amplifiers (38, 40, 40') coupled with different input ports of the at least one radio frequency coil. A controller (66, 70) controls the magnetic resonance excitation system to produce a time varying spatial B1 field distribution in a subject (16) in the examination region that time integrates to define a spatial tip angle distribution in the subject having reduced spatial non uniformity.

Abstract translation: 在磁共振扫描器中，主磁体（20,22）至少在检查区域中产生静磁场。 磁场梯度系统（30,54）至少在检查区域中选择性地将磁场梯度叠加在静磁场上。 磁共振激励系统（36,36'）包括至少一个射频线圈（30,301,302,303），其布置成将射频B1场注入到检查区域中，并且至少两个射频放大器（38,40,303） 40'）耦合到所述至少一个射频线圈的不同输入端口。 控制器（66,70）控制磁共振激励系统以在检查区域中的对象（16）中产生时变空间B1场分布，该时间积分以在被摄体中定义具有降低的空间非均匀性的空间尖角分布 。

公开(公告)号：WO2005111646A1

公开(公告)日：2005-11-24

申请号：PCT/IB2005/051554

申请日：2005-05-11

Applicant: KONINKLIJKE PHILIPS ELECTRONICS, N.V. ,  MORICH, Michael, A. ,  DEMEESTER, Gordon, D. ,  ZHAI, Zhiyong ,  HARVEY, Paul, R.

Inventor： MORICH, Michael, A. ,  DEMEESTER, Gordon, D. ,  ZHAI, Zhiyong ,  HARVEY, Paul, R.

IPC: G01R33/34

CPC classification number: G01R33/34046 ,  G01R33/3453

Abstract: A transverse electromagnetic (TEM) coil is provided. The TEM coil includes an electrically conductive shell and an end plate disposed at a first end of the shell. The TEM coil also includes a plurality of TEM elements disposed within the shell, the plurality of TEM elements being shorter than the shell.

Abstract translation: 提供横向电磁（TEM）线圈。 TEM线圈包括导电壳体和设置在壳体的第一端处的端板。 TEM线圈还包括设置在壳体内的多个TEM元件，多个TEM元件比壳短。

公开(公告)号：WO2005001502A1

公开(公告)日：2005-01-06

申请号：PCT/IB2004/002175

申请日：2004-06-30

Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V. ,  MORICH, Michael, A. ,  HARVEY, Paul, R. ,  ZHAI, Zhiyong ,  DEMEESTER, Gordon, D.

Inventor： MORICH, Michael, A. ,  HARVEY, Paul, R. ,  ZHAI, Zhiyong ,  DEMEESTER, Gordon, D.

IPC: G01R33/58

CPC classification number: G01R33/28 ,  A61B5/055 ,  G01R33/288 ,  G01R33/583

Abstract: An MRI apparatus is provided. The apparatus includes a main magnet for generating a main magnetic field in an examination region, a plurality of gradient coils for generating gradient fields within the main field, an RF transmit coil for transmitting RF signals into the examination region and exciting magnetic resonance in a subject disposed therein in accordance with a plurality of imaging parameters, the transmitted RF signals having a SAR associated therewith, and a SAR processor for maintaining the transmitted RF signals below a prescribed SAR level.

Abstract translation: 提供MRI装置。 该装置包括用于在检查区域中产生主磁场的主磁体，用于在主场内产生梯度场的多个梯度线圈，用于将RF信号发送到检查区域中的激励磁共振的RF发射线圈 根据多个成像参数设置在其中，所发送的RF信号具有与其相关联的SAR，以及SAR处理器，用于将发射的RF信号保持在规定的SAR水平以下。

公开(公告)号：WO2009074966A1

公开(公告)日：2009-06-18

申请号：PCT/IB2008/055235

申请日：2008-12-12

Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V. ,  ZHAI, Zhiyong ,  MORICH, Michael ,  DEMEESTER, Gordon

Inventor： ZHAI, Zhiyong ,  MORICH, Michael ,  DEMEESTER, Gordon

IPC: G01R33/34 ,  G01R33/345 ,  G01R33/36 ,  G01R33/422

CPC classification number: G01R33/34046 ,  G01R33/34076 ,  G01R33/345 ,  G01R33/3453 ,  G01R33/3635 ,  G01R33/422

Abstract: A magnetic resonance coil includes parallel elongate conductive elements (32) arranged to define a cylinder, and end rings (34, 35) disposed at opposite ends of the parallel elongate conductive elements and oriented transverse to the parallel elongate conductive elements. The end rings are configured to support a sinusoidal 1 H or other first species magnetic resonance at a magnetic field strength. The end rings and the parallel elongate conductive elements are configured to cooperatively support a second species birdcage magnetic resonance at the same magnetic field strength, the second species being different from 1 H or other first species.

Abstract translation: 磁共振线圈包括布置成限定圆柱体的平行细长导电元件（32）和设置在平行细长导电元件的相对端并且横向于平行细长导电元件定向的端环（34,35）。 端环被配置成在磁场强度下支持正弦1H或其它第一种磁共振。 端环和平行细长导电元件构造成协同地支撑具有相同磁场强度的第二物种鸟笼磁共振，第二物种不同于1H或其它第一物种。

公开(公告)号：WO2009074965A1

公开(公告)日：2009-06-18

申请号：PCT/IB2008/055234

申请日：2008-12-12

Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V. ,  ZHAI, Zhiyong ,  GAUSS, Robert Charles ,  WONG, Eddy Yu Ping ,  MORICH, Michael ,  NIEMAN, Kevin Mitchell ,  DEMEESTER, Gordon

Inventor： ZHAI, Zhiyong ,  GAUSS, Robert Charles ,  WONG, Eddy Yu Ping ,  MORICH, Michael ,  NIEMAN, Kevin Mitchell ,  DEMEESTER, Gordon

IPC: G01R33/3415

CPC classification number: G01R33/3415 ,  G01R33/5659

Abstract: A magnetic resonance coil comprises a first set of coil elements (54, 56, 80) operatively connectable with a transmit channel (66, 74) to couple with a transmit region of sensitivity for a selected load at a magnetic field strength greater than 3 Tesla, and a second set of coil elements (52, 54, 82) operatively connectable with a receive channel (66, 74) to couple with a receive region of sensitivity for the selected load at the magnetic field strength greater than 3 Tesla. The first set of coil elements is arranged proximate to but not surrounding the transmit region of sensitivity, and the second set of coil elements is arranged proximate to but not surrounding the receive region of sensitivity. The first set of coil elements and the second set of coil elements having at least one coil element (52, 56) not in common. The first and second sets of coil elements define transmit and receive regions of sensitivity for the selected load at the magnetic field strength greater than 3 Tesla that are substantially similar.

Abstract translation: 磁共振线圈包括可操作地与发射通道（66,74）连接的第一组线圈元件（54,56,80），以与大于3特斯拉的磁场强度的选定负载的灵敏度的发射区域耦合 以及第二组线圈元件（52,54,82），其可操作地与接收通道（66,74）连接，以在大于3特斯拉的磁场强度下与所选择的负载的接收灵敏度区域耦合。 第一组线圈元件布置成靠近但不围绕灵敏度的发射区域，并且第二组线圈元件布置成接近但不包围灵敏度的接收区域。 第一组线圈元件和第二组线圈元件具有不共同的至少一个线圈元件（52,56）。 第一组和第二组线圈元件在大于3特斯拉的大于3特斯拉的磁场强度下为所选择的载荷定义灵敏度的发射和接收区域。

公开(公告)号：WO2008104894A2

公开(公告)日：2008-09-04

申请号：PCT/IB2008/050324

申请日：2008-01-30

Applicant: KONINKLIJKE PHILIPS ELECTRONICS, N.V. ,  ZHAI, Zhiyong ,  MORICH, Michael, A. ,  DEMEESTER, Gordon, D.

Inventor： ZHAI, Zhiyong ,  MORICH, Michael, A. ,  DEMEESTER, Gordon, D.

IPC: G01R33/34 ,  G01R33/36 ,  G01R33/422

CPC classification number: G01R33/34046 ,  G01R33/3635 ,  G01R33/422

Abstract: A radio frequency coil assembly includes an annular conductor (20, 22, 120) configured to support a sinusoidal electrical current distribution at a magnetic resonance frequency, and a radio frequency shield (30, 32, 34, 52, 60, 61, 130) shielding the annular conductor in at least one direction, the radio frequency shield including at least one of (i) a cylindrical shield portion (30, 60, 61, 130) surrounding a perimeter of the annular conductor, and (ii) a planar shield portion (32, 34, 52) arranged generally parallel with the annular conductor. In a magnetic resonance scanner embodiment, a magnet (10) generates a static magnetic field (B 0 ), a magnetic field gradient system (14) is configured to superimpose selected magnetic field gradients on the static magnetic field, and said radio frequency coil assembly is arranged with the annular conductor generally transverse to the static magnetic field (B o ).

Abstract translation: 射频线圈组件包括被配置为支持磁共振频率的正弦电流分布的环形导体（20,22，120）和射频屏蔽（30,32,34,52,60,61,130） 在至少一个方向上屏蔽环形导体，射频屏蔽包括以下至少一个：（i）围绕环形导体的周边的圆柱形屏蔽部分（30,60,61,130），和（ii）平面屏蔽 大体平行于环形导体布置的部分（32,34,52）。 在磁共振扫描器实施例中，磁体（10）产生静磁场（B SUB），磁场梯度系统（14）被配置为将选定的磁场梯度叠加在静磁场 ，并且所述射频线圈组件布置成与环形导体大致横向于静磁场（B SUB）。

公开(公告)号：WO2006120588A1

公开(公告)日：2006-11-16

申请号：PCT/IB2006/051212

申请日：2006-04-19

Applicant: KONINKLIJKE PHILIPS ELECTRONICS, N.V. ,  LEUSSLER, Christoph, G. ,  LUEDEKE, Kai-michael ,  MORICH, Michael, A. ,  ZHAI, Zhiyong ,  DEMEESTER, Gordon, D.

Inventor： LEUSSLER, Christoph, G. ,  LUEDEKE, Kai-michael ,  MORICH, Michael, A. ,  ZHAI, Zhiyong ,  DEMEESTER, Gordon, D.

IPC: G01R33/422

CPC classification number: G01R33/422 ,  G01R33/3628

Abstract: A radio frequency coil for magnetic resonance imaging includes an active coil member (70, 70 1 , 170, 270) that defines an imaging volume. The active coil member has a first open end (74) with a first cross-sectional dimension (dactive). A shield coil member (72, 72 1 , 72 2 , 72 3 , 72 4 , 72 5 , 172, 172 2 , 272) substantially surrounds the active coil member. The shield coil member has a constricted open end (88) arranged proximate to the first open end of the active coil member with a constricted cross-sectional dimension (dconst) that is less than the cross-sectional dimension (dShieid) of the shield coil member. In some embodiments, the radio frequency coil further includes an outer shield coil member (100) that is substantially larger than the shield coil member (72, 72 1 , 72 2 , 72 3 , 72 4 , 72 5 , 172, 172 2 , 272), and surrounds both the active coil member and the shield coil member.

Abstract translation: 用于磁共振成像的射频线圈包括限定成像体积的有源线圈构件（70,70A，170,270）。 有源线圈构件具有第一横截面尺寸（dactive）的第一开口端（74）。 屏蔽线圈构件（72,72，...，72，72，72，72，SUB） 大致围绕有源线圈构件。 屏蔽线圈构件具有靠近有源线圈构件的第一开口端布置的收缩的开口端（88），其缩小的横截面尺寸（dconst）小于屏蔽线圈的横截面尺寸（dShid） 会员。 在一些实施例中，射频线圈还包括外屏蔽线圈构件（100），该外屏蔽线圈构件（100）基本上大于屏蔽线圈构件（72,72，...，72） 72 3，72 4，72 5，172 172 172，272），并且包围活性物质 线圈构件和屏蔽线圈构件。

公开(公告)号：WO2006095297A1

公开(公告)日：2006-09-14

申请号：PCT/IB2006/050679

申请日：2006-03-03

Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V. ,  HARVEY, Paul, R. ,  HOLLE, Eerke ,  ZHAI, Zhiyong

Inventor： HARVEY, Paul, R. ,  HOLLE, Eerke ,  ZHAI, Zhiyong

IPC: G01R33/3415

CPC classification number: G01R33/34046 ,  G01R33/3415

Abstract: A magnetic resonance imaging system (10) utilizes an ultra-short RF body coil (36). The ultra-short body coil (36) is shorter than the mechanical equivalent birdcage coil by at least a factor of two. Such coil provides equivalent (B 1 ) magnetic field uniformity, while conforming to SAR limitations.

Abstract translation: 磁共振成像系统（10）利用超短RF体线圈（36）。 超短体线圈（36）比机械等效鸟笼线圈短至少两倍。 这种线圈在符合SAR限制的同时提供等效的（B 1 SUB）磁场均匀性。