Abstract
Energy metabolism is fundamental for life. It encompasses the utilization of carbohydrates, lipids, and proteins for internal processes, while aberrant energy metabolism is implicated in many diseases. In the present study, using three-dimensional (3D) printing from polycarbonate via fused deposition modeling, we propose a multi-nuclear radiofrequency (RF) coil design with integrated 1H birdcage and interchangeable X-nuclei (2H, 13C, 23Na, and 31P) single-loop coils for magnetic resonance imaging (MRI)/magnetic resonance spectroscopy (MRS). The single-loop coil for each nucleus attaches to an arc bracket that slides unrestrictedly along the birdcage coil inner surface, enabling convenient switching among various nuclei and animal handling. Compared to a commercial 1H birdcage coil, the proposed 1H birdcage coil exhibited superior signal-excitation homogeneity and imaging signal-to-noise ratio (SNR). For X-nuclei study, prominent peaks in spectroscopy for phantom solutions showed excellent SNR, and the static and dynamic peaks of in vivo spectroscopy validated the efficacy of the coil design in structural imaging and energy metabolism detection simultaneously.
摘要
能量代谢对生命活动至关重要,主要包括对碳水化合物、脂肪和蛋白质的利用过程,异常的能量代谢与诸多疾病密切相关。本研究提出了一种用于多核磁共振成像(MRI)与波谱(MRS)的射频线圈设计:通过3D打印线圈外壳和支架,将一个鸟笼1H线圈和可更换的单环X核(2H、13C、23Na和31P)线圈一体化集成,其中单环线圈通过一个弧形支架安装于鸟笼线圈内壁,使其可沿内壁轴向无阻碍地移动,方便实现成像实验中多核线圈的更换以及线圈相对于不同成像体的摆放。与商用鸟笼1H核线圈相比,本设计具有更好的1H信号激发均匀性和成像信噪比;小鼠的活体实验验证了线圈设计在成像与波谱研究方面的可行性与有效性,可同时满足结构成像和能量代谢检测的要求。综上所述,该多核线圈通过新型机械与电路设计可以简化多核磁共振成像能量代谢检测的实施过程。
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Data availability statement
The data presented in this study are available from the corresponding author upon reasonable request.
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Acknowledgments
This work was supported in part by the STI 2030 -Major Projects (No. 2021ZD0200401), the National Key Research and Development Program of China (No. 2018YFA0701400), the National Natural Science Foundation of China (Nos. 52277232, 52293424, 81701774, and 61771423), the Fundamental Research Funds for the Central Universities (Nos. 226-2022-00136 and 226-2023-00125), the Zhejiang Provincial Natural Science Foundation of China (No. LR23E070001), the Key R&D Program of Jiangsu Province (No. BE2022049), and the Key-Area R&D Program of Guangdong Province (No. 2018B030333001), China.
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Yi ZHANG, Zhiyan QUAN, and Xiaotong ZHANG designed the study. Garth J. THOMPSON provided experimental instrument and instructions on MRI operation. Yi ZHANG, Zhiyan QUAN, Feiyang LOU, Yujiao FANG, and Xiaotong ZHANG performed the experiments and collected data. Yi ZHANG and Zhiyan QUAN analyzed the data. Yi ZHANG and Zhiyan QUAN wrote the draft. Xiaotong ZHANG and Gao CHEN supervised the study and obtained the funding. All authors have read and approved the final manuscript, and therefore, have full access to all the data in the study and take responsibility for the integrity and security of the data.
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Yi ZHANG, Zhiyan QUAN, Feiyang LOU, Yujiao FANG, Garth J. THOMPSON, Gao CHEN, and Xiaotong ZHANG declare that there is no conflict of interest.
All institutional and national guidelines for the care and use of laboratory animals were followed. Animal experimentation was approved by the Ethics Committee of Laboratory Animal Center of Zhejiang University (approval number: ZJU20200064).
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Zhang, Y., Quan, Z., Lou, F. et al. A proton birdcage coil integrated with interchangeable single loops for multi-nuclear MRI/MRS. J. Zhejiang Univ. Sci. B 25, 168–180 (2024). https://doi.org/10.1631/jzus.B2300587
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DOI: https://doi.org/10.1631/jzus.B2300587
Key words
- Energy metabolism
- Magnetic resonance imaging (MRI)
- Magnetic resonance spectroscopy (MRS)
- Multi-nuclear
- Radiofrequency coil
- Three-dimensional (3D) printing