磁共振成像监测海水喷雾冻结过程。

MRI monitoring of sea spray freezing.

机构信息

MRI Centre, Department of Physics, UNB, Fredericton, NB, Canada.

Spraying Systems Co., Spray Analysis and Research Services, Wheaton, IL, USA.

出版信息

J Magn Reson. 2020 Jan;310:106647. doi: 10.1016/j.jmr.2019.106647. Epub 2019 Nov 13.

DOI:10.1016/j.jmr.2019.106647

PMID:31760148

Abstract

Sea spray icing is a common hazard for vessels and offshore structures in cold climates. In this paper, quantitative 3D MRI and T - T mapping of the formation of sea spray ice were performed. Three different freezing regimes were employed. During freezing, changes in both relaxation times and signal intensity were greater than an order of magnitude. Results show strong differences in brine intensity and distribution for the three freezing regimes. The observed ranges of spin densities and relaxation times during freezing are well suited to measurements with portable NMR devices. There is a considerable potential for the use of MRI in studies of sea spray ice.

摘要

海雾结冰是寒冷气候下船只和近海结构的常见危害。本文对海雾结冰形成的定量 3D MRI 和 T-T 映射进行了研究。采用了三种不同的冻结模式。在冻结过程中，弛豫时间和信号强度的变化都超过了一个数量级。结果表明，三种冻结模式下盐水的强度和分布有很大的差异。在冻结过程中观察到的自旋密度和弛豫时间范围非常适合使用便携式 NMR 设备进行测量。MRI 在海雾结冰研究中有很大的应用潜力。