Maier C F, Chu K C, Chronik B A, Rutt B K
Department of Medical Biophysics, University of Western Ontario London, Canada.
Magn Reson Med. 1995 Oct;34(4):604-11. doi: 10.1002/mrm.1910340417.
The authors describe a new gradient coil design for high resolution human, animal, specimen, or phantom imaging with high gradient efficiency and a large region of excellent gradient uniformity. Important features of our new design are the simple analytical description of the wire patterns that comprise the design, and ease of construction. Wires are spaced in a sinusoidal distribution around the circumference of the cylinder, and curved in an arcsin shape along the length of the cylinder. This coil produces a magnetic field pointing in a direction transverse to the axis of the coil with a gradient in the direction parallel to the axis of the coil. The same arcsin coil can be used to create a magnetic field pointing in a direction parallel to its axis with a gradient in a direction perpendicular to the coil axis. A prototype coil was constructed; field and inductance calculations were verified. Geometric variations on this coil design were modeled and their performance characteristics compared. This coil design is ideal for rapid implementation of a transverse gradient coil, since no specialized design software is required.
作者描述了一种用于高分辨率人体、动物、标本或体模成像的新型梯度线圈设计，该设计具有高梯度效率和大面积的优异梯度均匀性。我们新设计的重要特点是对构成该设计的导线图案进行简单的分析描述，且易于构建。导线围绕圆柱体圆周以正弦分布排列，并沿圆柱体长度呈反正弦形状弯曲。该线圈产生一个垂直于线圈轴线方向的磁场，并在线圈轴线平行方向上具有梯度。同样的反正弦线圈可用于创建一个平行于其轴线方向的磁场，并在垂直于线圈轴线的方向上具有梯度。构建了一个原型线圈；对磁场和电感计算进行了验证。对该线圈设计的几何变化进行了建模，并比较了它们的性能特征。这种线圈设计是快速实现横向梯度线圈的理想选择，因为不需要专门的设计软件。
