Research on magneto-acoustic-electrical tomography method based on liquid metal contrast agent and M sequence coded excitation.
10.7507/1001-5515.202207044
- Author:
Yuheng WANG
1
;
Junjie LIN
1
;
Wenshu MAI
1
;
Zhipeng LIU
1
;
Tao YIN
1
;
Shunqi ZHANG
1
Author Information
1. Institute of Biomedical Engineering, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin 300000, P. R. China.
- Publication Type:Journal Article
- Keywords:
Coded excitation;
Liquid metal;
Longest linear shift register sequence;
Magneto-acoustic-electric tomography
- MeSH:
Contrast Media;
Electricity;
Electric Conductivity;
Acoustics;
Tomography
- From:
Journal of Biomedical Engineering
2023;40(4):718-724
- CountryChina
- Language:Chinese
-
Abstract:
Magneto-acoustic-electric tomography (MAET) boasts high resolution in ultrasound imaging and high contrast in electrical impedance imaging, making it of significant research value in the fields of early tumor diagnosis and bioelectrical monitoring. In this study, a method was proposed that combined high conductivity liquid metal and maximum length sequence (M sequence) coded excitation to improve the signal-to-noise ratio. It was shown that, under rotational scanning, the liquid metal significantly improved the signal-to-noise ratio of the inter-tissue magneto-acoustic-electric signal and enhanced the quality of the reconstructed image. The signal-to-noise ratio of the signal was increased by 5.6, 11.1, 21.7, and 45.7 times under the excitation of 7-, 15-, 31-, and 63-bit M sequence code, respectively. The total usage time of 31-bit M sequence coded excitation imaging was shortened by 75.6% compared with single-pulse excitation when the same signal-to-noise ratio was improved. In conclusion, the imaging method combining liquid metal and M-sequence coding excitation has positive significance for improving MAET image quality.
