在0.55 T的微毫米肺部MRI中,使用平衡的平稳状态自由前行与半半径双回声读取 (bSTAR)
Grzegorz Bauman1,2, Nam G Lee3, Ye Tian4
1Division of Radiological Physics, Department of Radiology, University of Basel Hospital, Basel, Switzerland.
Magnetic resonance in medicine
|June 15, 2023
概括
高分辨率的形态肺部MRI在0.55T使用bSTAR技术是可行的. 这种自由呼吸方法提供了具有亚毫米分辨率的无文物图像,使得详细的肺部成像成为可能.
科学领域:
- 放射学 放射学是一门学科.
- 医疗成像医学成像
- 磁共振成像是一种磁共振成像技术.
背景情况:
- 磁共振成像 (MRI) 为解剖学可视化提供非电离辐射.
- 通过MRI实现高分辨率的肺部成像是具有挑战性的,因为呼吸运动和易感文物.
研究的目的:
- 为了证明高分辨率形态肺部MRI在0.55特斯拉 (T) 的可行性.
- 评估用于肺部成像的自由呼吸平衡稳定状态自由前行半半径双回声成像技术 (bSTAR).
主要方法:
- 在5名健康志愿者和1名患者中使用0.55T磁力共振扫描仪进行自闭式自由呼吸bSTAR成像.
- 采用摇摆的阿基米德螺旋极 (WASP) 轨迹来实现均的k空间覆盖.
- 通过压缩传感和回顾性自闭门以0.9mm和1.75mm分辨率重建呼吸器分辨率的图像.
主要成果:
- 在所有受试者中,bSTAR技术产生了无文物形态肺部图像.
- 短重复时间 (TR) 和0.55T场强度减轻了非共振工件.
- 对于0.9毫米和1.75毫米重建的平均信号噪声比 (SNR) 分别为3.6±0.8和24.9±6.2.
结论:
- 具有亚毫米同位素空间分辨率的形态肺部MRI在人类实验中可行,使用0.55T的bSTAR.
- 该bSTAR技术显示承诺详细的肺部评估用MRI.
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