MINIMUM ENERGY MRI GRADIENT COILS OF GENERAL GEOMETRY
MINIMUM ENERGY MRI GRADIENT COILS OF GENERAL GEOMETRY
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DOI：
10.1088/0957-0233/3/7/007
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发表时间：
1992-07-01
影响因子：
2.4
通讯作者：
PISSANETZKY, S
中科院分区：
文献类型：
--
作者：
PISSANETZKY, S
提出了一种以最小能量设计梯度线圈系统的新方法。新方法消除了以前对线圈几何形状的限制，并为任何形状的系统提供了统一的方法，包括传统的圆柱形和平面系统。可以很容易地实施现实约束，例如圆柱系统中的圆柱长度，平面系统中的平面尺寸，或者无电流槽或孔的存在。该方法可以处理在导电物体中产生的涡流，并与屏蔽或双屏蔽线圈系统。磁能被最小化后，所有的影响已包括在内，导致一个真正优化的现实世界的系统。该方法还采用了一种新的优化方案。给出了一个设计实例，结果表明，与以往的类似设计相比，该设计具有较低的能量、较小的电感和较好的梯度质量。
This paper presents a new method for the design of gradient coil systems for magnetic resonance imaging (MRI) With minimum energy. The new method eliminates previous restrictions on coil geometry and provides a unified approach for systems of any shape, including traditional cylindrical and planar systems. Realistic constraints can easily be enforced, such as the length of the cylinder in a cylindrical system, the size of the plane in a planar system, or the presence of current-free slots or holes. The method can deal with the eddy currents induced in conducting objects, and with shielded or double-shielded coil systems. The magnetic energy is minimized after all effects have been included, resulting in a truly optimized real-world system. The method also employs a new optimization scheme. A design example is presented and shown to have a substantially lower energy, smaller inductance and better gradient quality than previous similar designs.