一个灵活的射频线圈设计 (OxyTrack) 用于测量体腔中的氧气
Conner S Ubert1,2, Sergey V Petryakov1, Maciej M Kmiec1
1Department of Radiology, Geisel School of Medicine, Dartmouth College, Hanover, New Hampshire, USA.
Magnetic resonance in medicine
|November 15, 2025
概括
一个新的灵活传感器,OxyTrack,允许实时监测深度或复杂的身体区域的组织氧气. 这种电子磁共振 (EPR) 工具克服了刚性传感器的局限性,以获得更好的医疗洞察力.
科学领域:
- 生物医学工程 生物医学工程
- 医学物理 医学物理
- 频谱学是一种光谱学.
背景情况:
- 电子磁共振 (EPR) 光谱对于定量组织氧气测量至关重要.
- 传统的EPR共振器仅限于表面组织 (1-3厘米深).
- 临床需要在复杂的解剖区域进行深层组织氧气监测.
研究的目的:
- 开发一种灵活的基于线圈的射频传感器OxyTrack,用于实时测量氧气.
- 为了使在解剖学上复杂和狭窄的体腔中进行氧气监测.
- 为了克服刚性EPR线圈配置的局限性,用于深层组织访问.
主要方法:
- 开发了一种类似于导管的灵活射频线圈传感器 (OxyTrack),集成OxyChip.
- 使用修改后的同轴电缆进行腔体测量.
- 在小鼠胃肠道中评估了传感器校准,机械稳定性和生物验证.
主要成果:
- 氧轨显示高氧敏感性 (14.8mG/mmHg) 与线性反应 (0-160mmHg).
- 在机械应力下保持信号完整性.
- 在体内成功区分了正常和高氧直肠组织氧气水平 (p < 0.001).
结论:
- 灵活的OxyTrack传感器可以实现最少入侵的实时氧气监测.
- 促进复杂解剖位置的临床前研究.
- 在评估与氧相关的病理生理学方面显示出临床翻译的潜力.
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