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一种灵活的 12 通道头部线圈与商用 16 通道和 24 通道刚性头部线圈的性能比较。

Performance of a Flexible 12-Channel Head Coil in Comparison to Commercial 16- And 24-Channel Rigid Head Coils.

机构信息

Department of Radiology, Shuguang Hospital Affiliated with Shanghai University of Traditional Chinese Medicine.

Department of Diagnostic Radiology, City of Hope Medical Center.

出版信息

Magn Reson Med Sci. 2022 Oct 1;21(4):623-631. doi: 10.2463/mrms.mp.2021-0084. Epub 2021 Sep 17.

DOI:10.2463/mrms.mp.2021-0084
PMID:34544923
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9618927/
Abstract

PURPOSE

To compare the performance of a 12-channel flexible head coil (HFC12) with commercial 16-channel (HRC16) and 24-channel (HRC24) rigid coils.

METHODS

The phantom study was performed on a 1.5 T MR scanner with HFC12, HRC16, and HRC24. The SNR and noise correlation matrix of T1WI, T2WI, and diffusion weighted imaging (DWI) were measured. The SNR profiles were created according to the SNR. In addition, 1/g-factors were calculated in different acceleration directions. In the in vivo study, T1WI, T2WI, and DWI were performed in one healthy volunteer with three different coils. The SNR and noise correlation matrix were measured.

RESULTS

In the phantom study and in vivo study, the SNR of HFC12 in the transverse, sagittal, and coronal planes was the highest, followed by HRC24, and that of HRC16 was the lowest. The SNR profiles showed that the SNR at the edge of HFC12 was the highest. The mean value of the noise correlation matrix of HFC12 was the highest. The 1/g-factor results showed that HFC12 obtained the best acceleration ability in the head-foot acceleration direction when the reduction factor was set to two. The SNR of HFC12 in most cortices was significantly higher than that of HRC16 and HRC24, except in the occipital cortex. The SNR of HRC24 in the occipital cortex was higher than that of HFC12.

CONCLUSION

The SNR of HFC12 in T1WI, T2WI, and DWI was better than that of the HRC24 and HFC16. The SNR of HFC12 in the cortex was significantly higher than that of the commercial rigid head coil, except in the occipital cortex.

摘要

目的

比较 12 通道柔性头部线圈（HFC12）与商业 16 通道（HRC16）和 24 通道（HRC24）刚性线圈的性能。

方法

在 1.5 T 磁共振扫描仪上进行了 HFC12、HRC16 和 HRC24 的体模研究。测量了 T1WI、T2WI 和弥散加权成像（DWI）的 SNR 和噪声相关矩阵。根据 SNR 创建了 SNR 曲线。此外，还在不同加速方向计算了 1/g-因子。在体内研究中，使用三种不同的线圈对一名健康志愿者进行了 T1WI、T2WI 和 DWI 检查。测量了 SNR 和噪声相关矩阵。

结果

在体模研究和体内研究中，HFC12 在横断、矢状和冠状平面的 SNR 最高，其次是 HRC24，而 HRC16 的 SNR 最低。SNR 曲线显示，HFC12 的边缘 SNR 最高。HFC12 的噪声相关矩阵平均值最高。1/g-因子结果表明，当降采样因子设置为 2 时，HFC12 在头脚加速方向上获得了最佳的加速能力。除枕叶外，HFC12 在大多数皮质区的 SNR 明显高于 HRC16 和 HRC24。HRC24 在枕叶的 SNR 高于 HFC12。

结论

HFC12 在 T1WI、T2WI 和 DWI 的 SNR 优于 HRC24 和 HRC16。HFC12 在皮质区的 SNR 明显高于商用刚性头部线圈，除枕叶外。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4d0f/9618927/1fa8856eeca2/mrms-21-623-g6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4d0f/9618927/6476eeab451c/mrms-21-623-g1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4d0f/9618927/99fe56715df6/mrms-21-623-g2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4d0f/9618927/ed7399c13d7f/mrms-21-623-g3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4d0f/9618927/acfe87cb4faa/mrms-21-623-g4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4d0f/9618927/b3fa6f680b4d/mrms-21-623-g5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4d0f/9618927/1fa8856eeca2/mrms-21-623-g6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4d0f/9618927/6476eeab451c/mrms-21-623-g1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4d0f/9618927/99fe56715df6/mrms-21-623-g2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4d0f/9618927/ed7399c13d7f/mrms-21-623-g3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4d0f/9618927/acfe87cb4faa/mrms-21-623-g4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4d0f/9618927/b3fa6f680b4d/mrms-21-623-g5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4d0f/9618927/1fa8856eeca2/mrms-21-623-g6.jpg

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