Division of Bioengineering and Bioinformatics, Graduate School of Information Science and Technology, Hokkaido University, North 14, West 9, Kita-ku, Sapporo 060-0814, Japan.
Division of Bioengineering and Bioinformatics, Graduate School of Information Science and Technology, Hokkaido University, North 14, West 9, Kita-ku, Sapporo 060-0814, Japan.
J Magn Reson. 2014 Feb;239:29-33. doi: 10.1016/j.jmr.2013.12.003. Epub 2013 Dec 12.
This article describes a feasibility study of parallel image-acquisition using a two-channel surface coil array in continuous-wave electron paramagnetic resonance (CW-EPR) imaging. Parallel EPR imaging was performed by multiplexing of EPR detection in the frequency domain. The parallel acquisition system consists of two surface coil resonators and radiofrequency (RF) bridges for EPR detection. To demonstrate the feasibility of this method of parallel image-acquisition with a surface coil array, three-dimensional EPR imaging was carried out using a tube phantom. Technical issues in the multiplexing method of EPR detection were also clarified. We found that degradation in the signal-to-noise ratio due to the interference of RF carriers is a key problem to be solved.
本文描述了一种使用双通道表面线圈阵列在连续波电子顺磁共振（CW-EPR）成象中进行并行成象采集的可行性研究。通过在频域中对 EPR 检测进行复用实现了并行 EPR 成象。并行采集系统由两个表面线圈谐振器和用于 EPR 检测的射频（RF）桥组成。为了证明使用表面线圈阵列进行并行成象采集的这种方法的可行性，使用管状仿体进行了三维 EPR 成象。还阐明了 EPR 检测的多路复用方法中的技术问题。我们发现，由于 RF 载波的干扰导致的信噪比降低是需要解决的关键问题。
