Share:
Share this content in WeChat
X
Technical Article
Design and verification of flexible and elastic coil for the head of wearable MRI device
ZHANG Shuang  LI Guihao  WU Lin 

Cite this article as: Zhang S, Li GH, Wu L. Design and verification of flexible and elastic coil for the head of wearable MRI device[J]. Chin J Magn Reson Imaging, 2022, 13(2): 62-68. DOI:10.12015/issn.1674-8034.2022.02.013.


[Abstract] Objective To reduce the influence of the matching degree between the scanning site and the coil size on signal-to-noise ratio (SNR) in high field magnetic resonance imaging due to the difference of patients' body geometry.Materials and Methods To achieve better matching of scanning position and coil, one adult head was selected as the research object, and the flexible coil for the head was made by filling the surface of the coil with common-side regular hexagon. To verify the performance of the self-made coil and the commercial coil, comparative experiments were carried out with water film and true human head respectively.Results The water film experiment proved that with the increase of imaging depth, the SNR of the self-made coil showed a decline trend. The maximum SNR was of the surface layer which was 3 times that of the deep layer; compared with the commercial 8-channel head coil, from the tissue surface to the deep layer (46 mm) of the water film, the SNR of the self-made coil increased by 0-2 times. Compared with the SNR at the 46 mm depth, the SNR at a deeper point was reduced by about 15%. Scanning the coronal surface structure of the human head showed that the SNR value of the coronal surface structure of the human head had the largest SNR value at the surface position and the smallest SNR value at the center. From the surface layer to the deep layer, the SNR of the image gradually decreased. At the same time, due to incomplete coil laying, the imaging results would be worsened to a certain extent. The tests showed that the self-made coil was feasible and stable.Conclusions It fully proves that the combination of flexible material and elastic material can adapt to the geometric deformation caused by the adult's head change, so as to obtain the maximum filling coefficient inside the coil. At the same time, the imaging quality worsening caused by the incomplete laying of the coil also exists, which cannot be compensated by a high filling coefficient, so in the clinical application it cannot be ignored.
[Keywords] wearable;common-side regular hexagon;head coil;flexibility;magnetic resonance imaging

ZHANG Shuang1, 2, 3*   LI Guihao2, 3, 4   WU Lin2, 3  

1 School of Artificial Intelligence, Neijiang Normal University, Neijiang 641112, China

2 School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu 611731, China

3 High Field Magnetic Resonance Brain Imaging Laboratory of Sichuan, University of Electronic Science and Technology of China, Chengdu 611731, China

4 Radiotherapy Center, the First Affiliated Hospital of Xinxiang Medical University, Xinxiang 453100, China

Zhang S, E-mail: zhangshuanghua1@126.com

Conflicts of interest   None.

Received  2021-09-01
Accepted  2022-01-24
DOI: 10.12015/issn.1674-8034.2022.02.013
Cite this article as: Zhang S, Li GH, Wu L. Design and verification of flexible and elastic coil for the head of wearable MRI device[J]. Chin J Magn Reson Imaging, 2022, 13(2): 62-68.DOI:10.12015/issn.1674-8034.2022.02.013

[1]
McRobbie DW, Moore EA, Graves MJ. MRI from Picture to Proton[M]. Cambridge: Cambridge University Press, 2017. DOI: 10.1017/9781107706958
[2]
Roemer PB, Edelstein WA, Hayes CE, et al. NMR phased array[J]. Magn Reson Med, 1990, 16(2): 192-225. DOI: 10.1002/mrm.1910160203
[3]
Ma CW, Yang HY, Zhong K. Research progresses of high-field MRI 1H/31P dual-tuned radio frequency coil[J]. Chin J Magn Reson, 2021, 38(1): 118-139. DOI: 10.11938/cjmr20202826.
[4]
Fujita H, Zheng T, Yang XY, et al. RF surface receive array coils: the art of an LC circuit[J]. J Magn Reson Imaging, 2013, 38(1): 12-25. DOI: 10.1002/jmri.24159.
[5]
Zhang X, Hu LL, Qu Z, et al. Design of a radiofrequency coil for low-field magnetic resonance imaging by target-field method combined with CST simulation[J]. Chin J Med Phys, 2021, 38(6): 743-748. DOI: 10.3969/j.issn.1005-202X.2021.06.016.
[6]
Lufkin RB, Votruba J, Reicher M, et al. Solenoid surface coils in magnetic resonance imaging[J]. AJR Am J Roentgenol, 1986, 146(2): 409-412. DOI: 10.2214/ajr.146.2.409.
[7]
Wiggins GC, Triantafyllou C, Potthast A, et al. 32-channel 3 Tesla receive-only phased-array head coil with soccer-ball element geometry[J]. Magn Reson Med, 2006, 56(1): 216-223. DOI: 10.1002/mrm.20925.
[8]
Keil B, Blau JN, Biber S, et al. A 64-channel 3T array coil for accelerated brain MRI[J]. Magn Reson Med, 2013, 70(1): 248-258. DOI: 10.1002/mrm.24427.
[9]
Hardy CJ, Giaquinto RO, Piel JE, et al. 128-channel body MRI with a flexible high-density receiver-coil array[J]. J Magn Reson Imaging, 2008, 28(5): 1219-1225. DOI: 10.1002/jmri.21463.
[10]
Zhu XS, Liu ZZ, Liu ZY, et al. Optimized design of 3.0T cranial MRI main magnet coil[J]. Electr Autom, 2021, 43(3): 83-85. DOI: 10.3969/j.issn.1000-3886.2021.03.026.2021.03.026.
[11]
Xie YS, Wang SX, Zhang MR, et al. The value of preoperative multi-parametric MR features using surface coil exclusive designed for thyroid gland in predicting the metastatic status of regional lymph nodes in thyroid cancer[J]. Chin J Magn Reson Imaging, 2021, 12(4): 17-22. DOI: 10.12015/issn.1674-8034.2021.04.004.
[12]
Yang Q, Zou LY, Liu Z, et al. Application of a dedicated surface coil in thyroid MRI provides superior image quality[J]. Chin J Magn Reson Imaging, 2021, 12(2): 57-61. DOI: 10.12015/issn.1674-8034.2021.02.013.
[13]
Cui C, Ma QY, Chen H. Design and application of a new type of head fixator in MRI[J]. China Med Equip, 2021, 18(1): 7-9. DOI: 10.3969/J.ISSN.1672-8270.2021.01.002.
[14]
Li GH, Li Y, Zhu GY, et al. Design and verification of 5-channel 1.5T knee joint receiving coil based on wearable technology[J]. Technol Heal Care, 2020, 28(5): 495-505. DOI: 10.3233/thc-191817.
[15]
Lufkin RB, Votruba J, Reicher M, et al. Solenoid surface coils in magnetic resonance imaging[J]. AJR Am J Roentgenol, 1986, 146(2): 409-412. DOI: 10.2214/ajr.146.2.409.
[16]
Vasanawala SS, Stormont R, Lindsay S, et al. Development and clinical implementation of next generation very light weight and extremely flexible receiver arrays for pediatric MRI[EB/OL]. 2017: arXiv: 1705.00224[ DOI: ]. https://arxiv.org/abs/1705.00224.
[17]
Nordmeyer-Massner JA, De Zanche N, Pruessmann KP. Stretchable coil arrays: application to knee imaging under varying flexion angles[J]. Magn Reson Med, 2012, 67(3): 872-879. DOI: 10.1002/mrm.23240.
[18]
Kumar SA, Meenakshi KS, Narashimhan BRV, et al. Synthesis and characterization of copper nanofluid by a novel one-step method[J]. Mater Chem Phys, 2009, 113(1): 57-62. DOI: 10.1016/j.matchemphys.2008.07.027.
[19]
Wiggins GC. US2008007250 (A1) Shaped MRI Coil Array[P]. US, A61B5/05, US2007083924820070815.
[20]
Wiggins GC, Polimeni JR, Potthast A, et al. 96-Channel receive-only head coil for 3 Tesla: design optimization and evaluation[J]. Magn Reson Med, 2009, 62(3): 754-762. DOI: 10.1002/mrm.22028.
[21]
Gong ZG, Zhuang LH, Huang YW, et al. Study on magnetic resonance imaging of the mouse brain[J]. Chin Comput Med Imaging, 2021, 27(1): 47-51. DOI: 10.19627/j.cnki.cn31-1700/th.2021.01.010.

PREV Application of magnetic nanoparticles in vitro MRI of mouse macrophages
NEXT Intravoxel incoherent motion diffusion-weighted imaging for assessment of the differential diagnosis and Gleason grade in prostate cancer: a Meta-analysis
  



Tel & Fax: +8610-67113815    E-mail: editor@cjmri.cn