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开发超极化布坦气体用于通风肺部成像

Nuwandi M Ariyasingha¹, Anna Samoilenko¹, Md Raduanul H Chowdhury¹

¹Department of Chemistry, Karmanos Cancer Institute (KCI), Integrative Biosciences (Ibio), Wayne State University, Detroit, Michigan 48202, United States.

Chemical & biomedical imaging

|November 1, 2024

概括

研究人员开发了一种新方法来产生超极化布气体,这是一种基于质子的对比剂,用于MRI肺部成像. 这一进步为功能性肺部成像提供了比现有的高极化气体更快,更持久,更容易获得的替代方案.

科学领域:

磁共振成像 (MRI) 是一种磁共振成像技术.
医学成像物理医学成像物理
超极化对比剂超极化对比剂

背景情况:

核磁共振超极化显著提高了核磁共振的灵敏度,使得新的应用,如气体成像.
超极化129Xe被FDA批准用于肺部成像,但在生产成本和扫描器兼容性方面面临挑战.
质子高极化气表现有前途,但受到快速信号衰变和缓慢的生产速度的影响.

研究的目的:

调查高容量生产超极化布气的情况.
为了评估超极化丁的稳定性和生产速度.
为了证明超极化布坦用于肺呼吸成像的可行性.

主要方法:

使用Rh纳米粒子催化剂利用异质的对诱导极化.
采用丁烯气体作为对的对添加的前体.
评估过极化的旋转状态寿命 (T1和TS) 和生产率.
使用临床MRI扫描仪进行幻影和切除的肺部成像.

主要成果:

与相比,实现了双倍的超极化状态生活时间 (T1 ~ 1.6 秒,TS ~ 3.8 秒在 1 bar)
演示了高生产速度,高达每秒0.7标准升.
在幻象和切除的子肺部中成功成像高分辨率 (1.6 x 1.6 mm2) 的超极化布坦.

结论:

超极化丁为MRI提供了一个有前途的,稳定的,快速生成的以质子为基础的对比剂.
这项技术绕过了129Xe的局限性,使得功能性肺成像在临床上得到更广泛的应用.
该开发为各种MRI系统 (包括低场扫描仪) 的成本效益高,按需生产和成像铺平了道路.

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