一种用于极低场开放获取的人体肺部成像系统。
A System for Open-Access He Human Lung Imaging at Very Low Field.
作者信息
Ruset I C, Tsai L L, Mair R W, Patz S, Hrovat M I, Rosen M S, Muradian I, Ng J, Topulos G P, Butler J P, Walsworth R L, Hersman F W
机构信息
Department of Physics, University of New Hampshire, Physics Department, 9 Library Way, DeMeritt Hall, Durham, New Hampshire 03824.
出版信息
Concepts Magn Reson Part B Magn Reson Eng. 2006;29(4):210-221. doi: 10.1002/cmr.b.20075.
Abstract
We describe a prototype system built to allow open-access very-low-field MRI of human lungs using laser-polarized (3)He gas. The system employs an open four-coil electromagnet with an operational B(0) field of 4 mT, and planar gradient coils that generate gradient fields up to 0.18 G/cm in the x and y direction and 0.41 G/cm in the z direction. This system was used to obtain (1)H and (3)He phantom images and supine and upright (3)He images of human lungs. We include discussion on challenges unique to imaging at 50 -200 kHz, including noise filtering and compensation for narrow-bandwidth coils.
摘要
我们描述了一个构建的原型系统，该系统利用激光极化的³He气体实现人体肺部的开放式、超低场磁共振成像。该系统采用一个开放式四线圈电磁铁，其工作B₀场强为4 mT，还有平面梯度线圈，在x和y方向可产生高达0.18 G/cm的梯度场，在z方向可产生高达0.41 G/cm的梯度场。该系统用于获取¹H和³He体模图像以及人体肺部的仰卧位和直立位³He图像。我们还讨论了在50 - 200 kHz成像时所特有的挑战，包括噪声滤波和窄带宽线圈的补偿。
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本文引用的文献
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