The MR Cap: A single-sided MRI system designed for potential point-of-care limited field-of-view brain imaging
The MR Cap: A single-sided MRI system designed for potential point-of-care limited field-of-view brain imaging
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DOI：
10.1002/mrm.27861
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发表时间：
2019-11-01
影响因子：
3.3
通讯作者：
Wald, Lawrence L.
中科院分区：
文献类型：
--
作者：
McDaniel, Patrick C.;Cooley, Clarissa Zimmerman;Wald, Lawrence L.
目的：常规MRI系统的尺寸、成本和定位要求限制了它们的可用性，并且排除了作为监测或即时护理设备的使用。为了解决这个问题，我们开发了一种轻量级MRI，用于在缩小的视野（FOV）上进行即时脑部成像：B-0磁体采用遗传算法设计，优化了3 x 8 x 8 cm FOV上的均匀性，并内置了用于切片选择或读出编码的梯度。一对外部梯度线圈可实现其他两个方向的相位编码，射频（RF）线圈可提供激励和检测。该系统被证明与高分辨率1D“深度剖析”和3D幻影imaging.Results：轻质B 0磁铁实现了64 mT的平均场在成像区域的材料成本
Purpose: The size, cost, and siting requirements of conventional MRI systems limit their availability and preclude usage as monitoring or point-of-care devices. To address this, we developed a lightweight MRI for point-of-care brain imaging over a reduced field of view (FOV).Methods: The B-0 magnet was designed with a genetic algorithm optimizing homogeneity over a 3 x 8 x 8 cm FOV and a built-in gradient for slice selection or readout encoding. An external pair of gradient coils enables phase encoding in the other two directions and a radiofrequency (RF) coil provides excitation and detection. The system was demonstrated with high-resolution 1D "depth profiling" and 3D phantom imaging.Results: The lightweight B0 magnet achieved a 64-mT average field over the imaging region at a materials cost of