织物上的织物：一种基于导电织物的可穿戴线圈，使用切割绘图仪用于3T磁共振成像。

Fabric on fabric: A conductive fabric-based wearable coil using cutting plotter for MRI at 3T.

作者信息

Ramesh Thejas Vishnu, Martin-Moreno Sergio, Narongrit Folk W, Chang Christopher J S, Rayz Vitaliy L, Rispoli Joseph V

机构信息

Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana, USA.

Elmore Family School of Electrical and Computer Engineering, Purdue University, West Lafayette, Indiana, USA.

出版信息

Magn Reson Med. 2025 Sep 2. doi: 10.1002/mrm.70051.

DOI:10.1002/mrm.70051

PMID:40891329

Abstract

PURPOSE

Wearable coils fabricated using conductive threads have high resistance that limits SNR. The purpose of this work is to demonstrate the utility of conductive fabric as a coil conductor that can be fabricated using a cutting plotter.

METHODS

A single-channel coil was developed by feeding a conductive fabric sheet into an automatic cutting plotter. The fabric coil was loaded on a spherical phantom to evaluate SNR and B homogeneity and compared with a single-channel conductive thread coil and a rigid printed circuit board (PCB) coil. A 14-channel wearable neck array was developed for structural imaging of the cervical spine and 4D flow MRI of the carotid arteries. The SNR from structural images and velocity-to-noise ratio (VNR) from flow images were compared with a 16-channel commercial coil.

RESULTS

The single-channel conductive fabric coil provided 6.7% and 125.9% SNR increase when compared to the rigid PCB and conductive thread coils across 10 scan repetitions. The B field homogeneity was 96.4%, 1% higher than the rigid PCB and conductive thread coils. The wearable neck array demonstrated a 51.1% average SNR increase from the cervical spine images across three volunteers and a 12.0% VNR increase from the postprocessed 4D flow data when compared with the commercial 16-channel array.

CONCLUSION

The possibility of developing wearable coils using conductive fabric to enhance SNR in structural images and VNR in 4D flow images is demonstrated. The conductive fabric technique enables fabrication on commercial garments resulting in form-fitting wearable coils.

摘要

目的

使用导电线材制造的可穿戴线圈具有高电阻，这限制了信噪比（SNR）。本研究的目的是证明导电织物作为一种可通过切割绘图仪制造的线圈导体的实用性。

方法

通过将导电织物片材送入自动切割绘图仪来开发单通道线圈。将织物线圈加载到球形体模上以评估SNR和B场均匀性，并与单通道导电线材线圈和刚性印刷电路板（PCB）线圈进行比较。开发了一种14通道可穿戴颈部阵列，用于颈椎的结构成像和颈动脉的4D流动磁共振成像（MRI）。将结构图像的SNR和流动图像的速度噪声比（VNR）与16通道商业线圈进行比较。

结果

在10次扫描重复中，单通道导电织物线圈与刚性PCB线圈和导电线材线圈相比，SNR分别提高了6.7%和125.9%。B场均匀性为96.4%，比刚性PCB线圈和导电线材线圈高1%。与商业16通道阵列相比，可穿戴颈部阵列在三名志愿者的颈椎图像上平均SNR提高了51.1%，在处理后的4D流动数据上VNR提高了12.0%。