专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US5638595A Method for fabricating open MR magnet gradient coil 失效
标题翻译：制造开放MR磁体梯度线圈的方法
公开(公告)号：US5638595A
公开(公告)日：1997-06-17
申请号：US555374
申请日：1995-11-09
申请人： Gregory A. Repinski , Kevin E. Kinsey , Christopher C. Myers
发明人： Gregory A. Repinski , Kevin E. Kinsey , Christopher C. Myers
IPC分类号： A61B5/055 , G01R33/38 , G01R33/385 , H01F41/06 , H01F41/00
CPC分类号： G01R33/385 , H01F41/071 , G01R33/3806 , Y10T29/4902 , Y10T29/49799
摘要： A method is provided for fabricating a gradient coil for an MR imaging system having an open magnet. The method includes forming a structure from thin conductive material such as copper, the structure generally comprising a section of a cylinder and a section of an annulus joined to an edge of the cylinder section as a flange. During a first cutting operation, a plurality of first groove segments are cut through the material, each of the first groove segments lying in one of a plurality of cutting zones selectively positioned around the structure, a strip of material positioned between two adjacent groove segments comprising a coil turn segment. The coil turn segments of a cutting zone are rigidly joined to one another and to a support frame comprising the outer edge of the structure by suitable means. Thereafter, a second cutting operation is performed, whereby a plurality of second groove segments are cut through the material to completely form the gradient coil.
摘要翻译：提供了一种用于制造具有开放磁体的MR成像系统的梯度线圈的方法。该方法包括从诸如铜的薄导电材料形成结构，该结构通常包括圆柱体的一部分和连接到圆筒部分的边缘的环形部分作为凸缘。在第一切割操作期间，通过材料切割多个第一凹槽段，每个第一凹槽段位于围绕结构的多个切割区域中的一个切割区域中，位于两个相邻凹槽区段之间的材料条带包括线圈转弯段。切割区域的线圈转动部分通过合适的方式刚性地连接到包括结构的外边缘的支撑框架。此后，执行第二切割操作，由此通过材料切割多个第二凹槽段以完全形成梯度线圈。

2. 发明授权

US5304933A Surgical local gradient coil 失效
标题翻译：手术局部梯度线圈
公开(公告)号：US5304933A
公开(公告)日：1994-04-19
申请号：US738970
申请日：1991-08-01
申请人： Robert M. Vavrek , Christopher C. Myers
发明人： Robert M. Vavrek , Christopher C. Myers
IPC分类号： G01R33/28 , G01R33/34 , G01R33/385 , G01R33/20
CPC分类号： G01R33/34046 , G01R33/385 , G01R33/285
摘要： A local gradient coil adapted for use with stereotaxic devices includes an opening in the coil form positioned to minimize the disruption to the gradient fields and a bearing for moving the form with respect to the stereotaxic frame so that the opening may be limited in area and yet provide essentially unrestricted access to the patient. The windings in the neighborhood of the opening may be diverted by modifying the stream function of the windings in a manner to minimize the effect of the opening on the gradient field.
摘要翻译：适于与立体定位装置一起使用的局部梯度线圈包括线圈形式的开口，定位成使对梯度场的破坏最小化，以及用于相对于立体定位框架移动形状的轴承，使得开口可以局限于区域提供基本上无限制地访问患者。开口附近的绕组可以通过以使开口对梯度场的影响最小化的方式修改绕组的流功能来转向。

3. 发明授权

US5311135A Multiple tap gradient field coil for magnetic resonance imaging 失效
标题翻译：用于磁共振成像的多抽头梯度场线圈
公开(公告)号：US5311135A
公开(公告)日：1994-05-10
申请号：US988986
申请日：1992-12-11
申请人： Robert M. Vavrek , Christopher C. Myers
发明人： Robert M. Vavrek , Christopher C. Myers
IPC分类号： G01R33/385 , G01V3/00
CPC分类号： G01R33/385
摘要： An NMR imaging system includes an apparatus for producing a magnetic field gradient within an imaging volume into which the object being imaged is placed. The relatively linear region of the magnetic field gradient is adjusted depending upon the size of the object. The apparatus comprises a source of a gradient signal and four saddle coils positioned in quadrant of a sheet that is wrapped around a cylindrical form. Each saddle coil has a spiral shaped conductive pattern on which are located a primary termination point and a pair of secondary termination points. A switch mechanism connects the four saddle coils in series with the source of a gradient signal, so that voltage from the gradient signal is applied between the primary termination point and a selected secondary termination point of each saddle coil. A control signal applied to the switch mechanism indicates selected secondary termination point and the signal varies according to the size of the object.
摘要翻译： NMR成像系统包括用于在成像体内产生磁场梯度的装置，成像对象被放置在该成像体内。根据物体的尺寸来调节磁场梯度的相对线性区域。该装置包括梯度信号源和位于围绕圆柱形的纸张的四分之一中的四个鞍形线圈。每个鞍形线圈具有螺旋形导电图案，其上定位有主终端点和一对次终端点。开关机构将四个鞍形线圈与梯度信号源串联连接，使得来自梯度信号的电压施加在主终端点和每个鞍形线圈的选定次级终端点之间。施加到开关机构的控制信号指示所选择的次要终止点，并且信号根据对象的大小而变化。

4. 发明授权

US5185576A Local gradient coil 失效
标题翻译：局部梯度线圈
公开(公告)号：US5185576A
公开(公告)日：1993-02-09
申请号：US743550
申请日：1991-08-12
申请人： Robert M. Vavrek , Daniel J. Schaefer , Christopher C. Myers , Thomas G. McFarland , Robert Turner
发明人： Robert M. Vavrek , Daniel J. Schaefer , Christopher C. Myers , Thomas G. McFarland , Robert Turner
IPC分类号： G01R33/34 , G01R33/385
CPC分类号： G01R33/34046 , G01R33/34076 , G01R33/385 , G01R33/3854
摘要： A compact local gradient coil is combined with a local RF coil to provide lower powered, higher strength gradient fields and faster gradient response as is useful in magnetic resonance imaging. Interference between the RF coil and gradient coil is minimized by placement of the gradient coil external to the RF coil and by gradient coils that are axially symmetric and/or have conductors substantially orthogonal to the RF coil conductors. Acoustic noise in these smaller, stronger coils is reduced with ports cut into the coil forms.
摘要翻译：紧凑的局部梯度线圈与本地RF线圈组合，以提供较低功率，更高强度的梯度场和更快的梯度响应，如在磁共振成像中有用的。通过将RF线圈外部的梯度线圈和轴向对称和/或具有与RF线圈导体基本正交的导体的梯度线圈放置，RF线圈和梯形线圈之间的干扰被最小化。这些更小，更强的线圈中的声音噪声减少，端口切入线圈形式。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式