Self-navigated subspace reconstruction for real-time MR imaging of the vocal tract

IF 2.1 4区医学 Q2 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING

Magnetic resonance imaging Pub Date : 2024-10-05 DOI:10.1016/j.mri.2024.110243

Peng Cao , Wenting Jiang , Changhe Chen , Yiang Wang , Jonathan Havenhill

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引用次数: 0

Abstract

Purpose: Real-time MRI offers a continuous and dynamic view of the object being imaged. Researchers have applied real-time MRI to speech production, which allows for the visualization of the vocal tract during speech.

Methods: This study proposed applying self-navigated subspace reconstruction for real-time vocal tract imaging. We performed experiments on a clinical 3 T MRI using standard RF coils and rapid acquisition. Additionally, 1000 frames were compressed during reconstruction to a few principal components, and iterative low-rank approximation was performed on compressed k-space, in conjunction with the orthogonal basis estimation for the subspace.

Results: The simulation study involving a 32-time acceleration showed that the proposed method produced a reasonably small root mean square error (RMSE) of 0.159, compared to 0.278 for sliding window reconstruction, 0.2527 for SToRM and 0.294 for low-rank reconstruction. The study also presented in vivo images of a typical sagittal image with a temporal resolution of 7 ms/frame or 21 ms/frame for the three-slice scan.

Conclusion: Our study presented a subspace reconstruction technique that does not require a navigator echo, which can be used for real-time MRI, particularly in speech imaging applications.

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用于声道实时磁共振成像的自导航子空间重建。

目的：实时核磁共振成像可提供被成像物体的连续动态视图。研究人员已将实时磁共振成像应用于语音生成，从而实现了语音过程中声道的可视化：本研究建议将自导航子空间重建应用于声道实时成像。我们使用标准射频线圈和快速采集技术，在临床 3 T 磁共振成像仪上进行了实验。此外，在重建过程中将 1000 个帧压缩为几个主成分，并在压缩的 k 空间上进行迭代低秩逼近，同时对子空间进行正交基估计：涉及 32 次加速的模拟研究表明，与滑动窗口重建的 0.278、STORM 的 0.2527 和低秩重建的 0.294 相比，所提出的方法产生的均方根误差（RMSE）非常小，仅为 0.159。该研究还展示了典型矢状面图像的活体图像，其时间分辨率为 7 毫秒/帧，三片扫描的时间分辨率为 21 毫秒/帧：我们的研究提出了一种无需导航回波的子空间重建技术，可用于实时磁共振成像，尤其是语音成像应用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Magnetic resonance imaging 医学-核医学

CiteScore

4.70

自引率

4.00%

发文量

194

审稿时长

83 days

期刊介绍： Magnetic Resonance Imaging (MRI) is the first international multidisciplinary journal encompassing physical, life, and clinical science investigations as they relate to the development and use of magnetic resonance imaging. MRI is dedicated to both basic research, technological innovation and applications, providing a single forum for communication among radiologists, physicists, chemists, biochemists, biologists, engineers, internists, pathologists, physiologists, computer scientists, and mathematicians.