公开(公告)号：US5361765A

公开(公告)日：1994-11-08

申请号：US57939

申请日：1993-05-07

申请人： David J. Herlihy ,  Eddy B. Boskamp

发明人： David J. Herlihy ,  Eddy B. Boskamp

IPC分类号： A61B5/055 ,  G01R33/34 ,  G01R33/36

CPC分类号： A61B5/0555 ,  G01R33/34046 ,  G01R33/34007 ,  G01R33/34061 ,  G01R33/34084 ,  G01R33/3415 ,  G01R33/365 ,  G01R33/3664 ,  G01R33/3678

摘要： A quadrature local coil includes a bifurcated first loop positioned on one side of the patient and sensitive to RF magnetic flux generally parallel to the surface of the loop and a second loop positioned on the other side of the patient, opposed to the first loop and sensitive to RF magnetic flux within the patient perpendicular to that to which the first loop is sensitive. In one embodiment, the first and second loops are mounted in opposing concave shells held against and supported by the patient.

摘要翻译： 正交局部线圈包括位于患者一侧的分叉第一环，并且对通常平行于环的表面的RF磁通敏感，并且第二环位于患者的另一侧，与第一环相对并且敏感 到垂直于第一回路敏感的患者内的RF磁通量。 在一个实施例中，第一和第二环安装在保持抵靠患者身上并由患者支撑的相对的凹形外壳中。

公开(公告)号：US5530354A

公开(公告)日：1996-06-25

申请号：US282992

申请日：1994-07-29

申请人： David J. Herlihy ,  Amy Herlihy

发明人： David J. Herlihy ,  Amy Herlihy

IPC分类号： G01R33/34 ,  G01R33/385 ,  G01R33/20

CPC分类号： G01R33/3415 ,  G01R33/385

摘要： A local gradient coil for use in magnetic resonance imaging provides a system of windings that produces a non-monotonic gradient field. The non-monotonic field provides spatially separate regions experiencing similar gradients and thus does not uniquely identify spatially separate spins. Multiple receiving coils positioned near each of the regions of similar gradient field strength are used to receive the multiple NMR signals. A determination of the sensitivity of these receiving coils may be used to determine the contribution from each spin to the signal produced by each coil thus allowing the superimposed signals to be separated.

摘要翻译： 用于磁共振成像的局部梯度线圈提供了产生非单调梯度场的绕组系统。 非单调场提供经历类似梯度的空间分离的区域，因此不能唯一地标识空间分离的旋转。 使用位于每个具有相似梯度场强度的区域附近的多个接收线圈来接收多个NMR信号。 可以使用这些接收线圈的灵敏度的确定来确定每个旋转对由每个线圈产生的信号的贡献，从而允许叠加的信号被分离。