公开(公告)号：US08638101B2

公开(公告)日：2014-01-28

申请号：US12861871

申请日：2010-08-24

Applicant: Jin Jun Chen ,  Cheng Ni

Inventor： Jin Jun Chen ,  Cheng Ni

IPC: G01R33/44

CPC classification number: G01R33/3873 ,  G01R33/3875

Abstract: In a method and device for compensating the insufficient homogeneity of a magnetic field in a magnetic resonance system, the spatial position and size of a basic magnetic field region and at least one additional magnetic field region in a field to be homogenized and determined. An optimization calculation is implemented on the basic magnetic field region and the at least one additional magnetic field region. A homogenized magnetic field at the main magnetic field region and the at least one additional magnetic field region is output according to the result of the optimization calculation.

Abstract translation: 在用于补偿磁共振系统中的磁场不均匀性的方法和装置中，基本磁场区域的空间位置和尺寸以及要均匀化并确定的场中的至少一个附加磁场区域。 在基本磁场区域和至少一个附加磁场区域上实现优化计算。 根据优化计算的结果，输出主磁场区域和至少一个附加磁场区域的均匀化磁场。

公开(公告)号：US20110050229A1

公开(公告)日：2011-03-03

申请号：US12861871

申请日：2010-08-24

Applicant: Jin Jun Chen ,  Cheng Ni

Inventor： Jin Jun Chen ,  Cheng Ni

IPC: G01R33/44

CPC classification number: G01R33/3873 ,  G01R33/3875

Abstract: In a method and device for compensating the insufficient homogeneity of a magnetic field in a magnetic resonance system, the spatial position and size of a basic magnetic field region and at least one additional magnetic field region in a field to be homogenized and determined. An optimization calculation is implemented on the basic magnetic field region and the at least one additional magnetic field region. A homogenized magnetic field at the main magnetic field region and the at least one additional magnetic field region is output according to the result of the optimization calculation.

Abstract translation: 在用于补偿磁共振系统中的磁场不均匀性的方法和装置中，基本磁场区域的空间位置和尺寸以及要均匀化并确定的场中的至少一个附加磁场区域。 在基本磁场区域和至少一个附加磁场区域上实现优化计算。 根据优化计算的结果，输出主磁场区域和至少一个附加磁场区域的均匀化磁场。

公开(公告)号：US08115580B2

公开(公告)日：2012-02-14

申请号：US12348659

申请日：2009-01-05

Applicant: Cheng Ni ,  Ting Qiang Xue ,  Jin Jun Chen

Inventor： Cheng Ni ,  Ting Qiang Xue ,  Jin Jun Chen

IPC: H01F1/00 ,  H01F6/00 ,  H01F7/00

CPC classification number: G01R33/3873

Abstract: A magnetic field adjusting device includes a pair of opposing pole plates mounted on respective magnetic field generating sources, forming a magnetic field space; a plurality of shimming plugs movably mounted at the periphery of the pole plates, with each shimming plug being mounted in a radially oriented retaining groove, so as to be moveable in the direction of the retaining groove. Additionally, or alternatively, the circumferences of the magnetic field generating sources are arranged with adjusting bars which can move perpendicular to the pole plates.

Abstract translation: 一种磁场调节装置，包括安装在相应的磁场发生源上的一对相对极板，形成磁场空间; 多个可移动地安装在极板周边的匀整插头，每个隔片插头安装在径向取向的保持槽中，以便沿保持槽的方向移动。 另外或者替代地，磁场产生源的周边布置有可以垂直于极板移动的调节杆。

公开(公告)号：US07218114B2

公开(公告)日：2007-05-15

申请号：US11394629

申请日：2006-03-31

Applicant: Cheng Ni ,  Hui Cao ,  Jin Jun Chen ,  Zhong You Ren

Inventor： Cheng Ni ,  Hui Cao ,  Jin Jun Chen ,  Zhong You Ren

IPC: G01V3/00

CPC classification number: G01R33/3873 ,  G01R33/3875

Abstract: In a shimming method for an irregular object to be examined by magnetic resonant equipment magnetic field parameters are measured at measurement points located on the surface of an irregular object to be examined. Based on the measured magnetic field parameters, the positions and number of shims for adjusting magnetic field homogeneity are calculated when a passive shimming is to be performed, or the current value in a shimming coil are calculated when an active shimming is to be performed, or at the same time both the positions and number of shims and current value in the shimming coil are calculated when active shimming and passive shimming are to be performed at the same time. Shimming is then performed according to the calculated results. These above steps are repeated until achieving required magnetic field homogeneity. Since the homogeneous region is designed to have an irregular shape, it can provide a better coverage of the irregular object to be examined, and at the same time it reduces the shimming constraints to the unnecessary regions outside the irregular object to be examined, therefore avoiding shimming in those unnecessary regions.

Abstract translation: 在通过磁共振设备检查的不规则物体的匀场方法中，在位于待检查的不规则物体的表面上的测量点处测量磁场参数。 基于测量的磁场参数，当要执行被动匀场调整时计算用于调整磁场均匀性的垫片的位置和数量，或者当要执行活动匀场时计算匀场线圈中的当前值，或 同时，当同时进行有效匀场和被动匀场时，同时计算匀场线圈的位置和数量以及匀场线圈中的当前值。 然后根据计算结果执行匀场。 重复上述步骤，直到达到所需的磁场均匀性。 由于均匀区域被设计成具有不规则形状，所以可以提供对待检查的不规则物体的更好的覆盖，并且同时将匀场限制减小到待检查的不规则物体之外的不需要的区域，因此避免 在这些不必要的地区。

公开(公告)号：US20090179720A1

公开(公告)日：2009-07-16

申请号：US12348659

申请日：2009-01-05

Applicant: Cheng NI ,  Ting Qiang Xue ,  Jin Jun Chen

Inventor： Cheng NI ,  Ting Qiang Xue ,  Jin Jun Chen

IPC: H01F7/02

CPC classification number: G01R33/3873

Abstract: The present invention relates to a magnetic field adjusting device; such as may be used in MRI apparatus. The device can overcome the magnetic force to enable shimming plugs to move in a controlled continuous manner, thereby achieving continuous adjusting and accurate positioning. The magnetic field adjusting device comprises; a pair of opposing pole plates (3, 31), respectively mounted on magnetic field generating sources, forming a magnetic field space; a plurality of shimming plugs (42) movably mounted at the periphery of said pole plates (3, 31), each shimming plug (42) mounted in a radially oriented retaining groove (45), so as to be moveable in the direction of the retaining groove. Additionally, or alternatively, the circumferences of the magnetic field generating sources (5, 51) are arranged with adjusting bars (71, 81) which can move perpendicular to the pole plates. As an advantage of the present invention, the magnetic field can be shimmed conveniently quickly, and accurately to improve the imaging quality.

Abstract translation: 磁场调整装置技术领域本发明涉及磁场调整装置， 例如可用于MRI装置。 该装置可以克服磁力，以使塞子以受控的连续方式移动，从而实现连续的调节和准确的定位。 磁场调节装置包括： 分别安装在磁场产生源上的一对相对极板（3,31），形成磁场空间; 多个可移动地安装在所述极板（3,31）的周边的垫片塞（42），每个垫片塞（42）安装在径向取向的保持槽（45）中，以便能够沿着 保持槽。 另外或者替代地，磁场产生源（5,51）的周向布置有可以垂直于极板移动的调节杆（71,81）。 作为本发明的优点，可以方便地快速，准确地对磁场进行补片，以提高成像质量。

公开(公告)号：US07541904B2

公开(公告)日：2009-06-02

申请号：US10591639

申请日：2005-03-07

Applicant: Cheng Ni ,  Ting Qiang Xue ,  Jin Jun Chen

Inventor： Cheng Ni ,  Ting Qiang Xue ,  Jin Jun Chen

IPC: H01F1/00 ,  H01F6/00 ,  H01F7/00

CPC classification number: G01R33/3873

Abstract: The present invention relates to a magnetic field adjusting device; such as may be used in MRI apparatus. The device can overcome the magnetic force to enable shimming plugs to move in a controlled continuous manner, thereby achieving continuous adjusting and accurate positioning. The magnetic field adjusting device comprises; a pair of opposing pole plates (3, 31), respectively mounted on magnetic field generating sources, forming a magnetic field space; a plurality of shimming plugs (42) movably mounted at the periphery of said pole plates (3, 31), each shimming plug (42) mounted in a radially oriented retaining groove (45), so as to be movable in the direction of the retaining groove. Additionally, or alternatively, the circumferences of the magnetic field generating sources (5, 51) are arranged with adjusting bars (71, 81) which can move perpendicular to the pole plates. As an advantage of the present invention, the magnetic field can be shimmed conveniently quickly, and accurately to improve the imaging quality.

Abstract translation: 磁场调整装置技术领域本发明涉及磁场调整装置， 例如可用于MRI装置。 该装置可以克服磁力，以使塞子以受控的连续方式移动，从而实现连续的调节和准确的定位。 磁场调节装置包括： 分别安装在磁场产生源上的一对相对极板（3,31），形成磁场空间; 多个可移动地安装在所述极板（3,31）的周边的垫片塞（42），每个垫片塞（42）安装在径向取向的保持槽（45）中，以便可沿着 保持槽。 另外或者替代地，磁场产生源（5,51）的周向布置有可以垂直于极板移动的调节杆（71,81）。 作为本发明的优点，可以方便地快速，准确地对磁场进行补片，以提高成像质量。

公开(公告)号：US08519712B2

公开(公告)日：2013-08-27

申请号：US12980553

申请日：2010-12-29

Applicant: Jin Jun Chen ,  Oliver Schreck

Inventor： Jin Jun Chen ,  Oliver Schreck

IPC: G01R33/44

CPC classification number: G01R33/3875 ,  G01R33/58

Abstract: In a method and apparatus for correcting the uniformity of a magnetic field, an active shim shell is placed in the magnetic field, a magnetic resonance image of the active shim shell obtained, and the placement position of the active shim shell is determined by analyzing the magnetic resonance image. The value of a shim current in the active shim shell is determined so as to meet the uniformity requirements of the magnetic field according to the placement position. The value of the shim current in said active shim shell is set to the determined value of the shim current.

Abstract translation: 在用于校正磁场均匀性的方法和装置中，将有源垫片放置在磁场中，获得活动垫片壳的磁共振图像，并且通过分析活动垫片壳体的放置位置来确定活动垫片壳体的放置位置 磁共振图像。 确定活动垫片中的垫片电流的值，以便根据放置位置满足磁场的均匀性要求。 所述活动垫片外壳中的垫片电流值被设置为确定的垫片电流值。

公开(公告)号：US20110163750A1

公开(公告)日：2011-07-07

申请号：US12980553

申请日：2010-12-29

Applicant: Jin Jun Chen ,  Oliver Schreck

Inventor： Jin Jun Chen ,  Oliver Schreck

IPC: G01R33/44

CPC classification number: G01R33/3875 ,  G01R33/58

Abstract: In a method and apparatus for correcting the uniformity of a magnetic field, an active shim shell is placed in the magnetic field, a magnetic resonance image of the active shim shell obtained, and the placement position of the active shim shell is determined by analyzing the magnetic resonance image. The value of a shim current in the active shim shell is determined so as to meet the uniformity requirements of the magnetic field according to the placement position. The value of the shim current in said active shim shell is set to the determined value of the shim current.

Abstract translation: 在用于校正磁场均匀性的方法和装置中，将有源垫片放置在磁场中，获得活动垫片壳的磁共振图像，并且通过分析活动垫片壳体的放置位置来确定活动垫片壳体的放置位置 磁共振图像。 确定活动垫片中的垫片电流的值，以便根据放置位置满足磁场的均匀性要求。 所述活动垫片外壳中的垫片电流值被设置为确定的垫片电流值。