可伸缩的接收线圈用于7T小型动物MRI
Thejas Vishnu Ramesh1, Folk W Narongrit2, Antonia Susnjar1
1Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN 47907, USA.
Journal of magnetic resonance (San Diego, Calif. : 1997)
|June 21, 2023
概括
研究人员开发了一种用于小动物成像的新型可拉伸的MRI线圈,与传统线圈相比,显著改善了信号噪声比 (SNR) 和透深度. 这项创新增强了大鼠大脑和脊柱扫描中的解剖细节.
科学领域:
- 磁共振成像 (MRI) 是一种磁共振成像技术.
- 生物医学工程 生物医学工程
- 小动物成像小动物成像
背景情况:
- 传统的小型动物MRI接收线圈是刚性的,不符合解剖结构.
- 在人体成像方面取得成功的可伸缩线圈技术尚未广泛应用于小型动物MRI.
- 需要改进线圈设计,以提高小动物研究中的图像质量.
研究的目的:
- 展示可伸缩MRI线圈的应用和性能,用于7特斯拉 (7T) 的小动物成像.
- 为了比较新型拉伸式线圈与传统线圈的信号噪声比率 (SNR) 和透深度.
- 评估使用可伸缩线圈获取大鼠大脑和脊柱详细解剖图像的可行性.
主要方法:
- 开发了一个3.5×3.5厘米可伸缩的MRI线圈.
- 用传统的柔性印刷电路板 (PCB) 线圈和商用表面线圈对 SNR 地图进行比较.
- 对开发的线圈进行拉伸和符合性测试.
- 使用T1 FLASH和T2 Turbo RARE序列获取老鼠大脑和脊柱的体外图像.
- 一个开源的plug-and-play系统的表征,用于与7T Bruker扫描仪连接线圈.
主要成果:
- 与商用卷轴相比,可伸缩卷轴对T1加权和T2加权图像的SNR分别高出48.5%和42.8%.
- 在使用可伸缩线圈的感兴趣区域 (ROI) 中,平均透深度增加了33%.
- 实体影像显示了大鼠大脑和脊柱中可辨别的解剖细节.
- 拉伸线圈降低了共振频率和SNR,而对样本体积的符合性增加了共振频率和SNR.
结论:
- 可伸缩的MRI线圈为7T的小动物成像提供了显著的优势,包括增强的SNR和透深度.
- 开发的线圈技术可以在小型动物模型中获得高分辨率的解剖图像.
- 该研究提供了一个开源系统,促进研究界更广泛地采用先进的线圈技术.
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