Improving Signal-to-Noise Ratio and Imaging Speed in Magneto-Acoustic Imaging using Coded Excitation
Anahtar Kelimeler:
Magneto-Acoustic Imaging, Signal-to-Noise Ratio, Coded Excitation, Imaging SpeedÖzet
In the field of early tumor diagnosis, magneto-acoustic imaging based on the magneto-acoustic effect provides valuable information about tissue characteristics. However, the signal-to-noise ratio (SNR) of the imaging results using the conventional single pulse method is limited, affecting both the imaging quality and speed. To address this limitation, we propose a processing method that utilizes coded excitation and pulse compression to enhance the SNR in magneto-acoustic imaging. Specifically, we introduce the widely-used Barker code, known for its effectiveness in ultrasonic signal processing, to improve the SNR of the magneto-acoustic signal. Through simulations on magneto-acoustic and pulse compressed signals under Barker coded excitation with varying bit lengths, we demonstrate the improved SNR achieved with the proposed method. Furthermore, experimental validation using pork and graphite slice samples confirms the effectiveness of the coded excitation approach. The results show that when a 16-bit Barker code is used as the excitation signal, the SNR of the magneto-acoustic signal improves by 20.9 dB. Moreover, compared to the single pulse excitation method, the coded excitation method significantly reduces processing time by 96.1% while achieving similar SNR improvement. In conclusion, the coded excitation method effectively enhances the SNR and imaging quality of magneto-acoustic signals, and it also improves the imaging speed in magneto-acoustic imaging.
Referanslar
tissues: II. Measurements in the frequency range 10 Hz to 20 GHz. Physics in medicine & biology. 1996 Nov 1;41(11):2251.
Gabriel C, Gabriel S, Corthout YE. The dielectric properties of biological tissues: I. Literature survey. Physics in medicine & biology. 1996 Nov 1;41(11):2231.
Kok HP, Cressman EN, Ceelen W, Brace CL, Ivkov R, Grüll H, Ter Haar G, Wust P, Crezee J. Heating technology for malignant tumors: A review. International Journal of Hyperthermia. 2020 Jan 1;37(1):711-41.
Choi YS, Yin RT, Pfenniger A, Koo J, Avila R, Benjamin Lee K, Chen SW, Lee G, Li G, Qiao Y, Murillo-Berlioz A. Fully implantable and bioresorbable cardiac pacemakers without leads or batteries. Nature biotechnology. 2021 Oct;39(10):1228-38.
Gabriel S, Lau RW, Gabriel C. The dielectric properties of biological tissues: III. Parametric models for the dielectric spectrum of tissues. Physics in medicine & biology. 1996 Nov 1;41(11):2271.
M. Izadi, M. Jabari, N. Izadi, M. Jabari, and A. Ghaffari, "Adaptive Control based on the Lyapunov Reference Model Method of Humanoid Robot Arms using EFK," in 2021 13th Iranian Conference on Electrical Engineering and Computer Science (ICEESC), 2021.
Martinsen OG, Grimnes S. Bioimpedance and bioelectricity basics. Academic press; 2011 Aug 29.
Sihvola AH. Electromagnetic mixing formulas and applications. Iet; 1999.
Obien ME, Deligkaris K, Bullmann T, Bakkum DJ, Frey U. Revealing neuronal function through microelectrode array recordings. Frontiers in neuroscience. 2015 Jan 6;8:423.
Khan SR, Pavuluri SK, Cummins G, Desmulliez MP. Wireless power transfer techniques for implantable medical devices: A review. Sensors. 2020 Jun 19;20(12):3487.
N. Izadi, M. Jabari, M. Izadi, M. Jabari, and A. Ghaffari, "Optimal Path Design for a Flexible Rigid Two-Bar Robot in Point-to-Point Motion," in 2022 14th Iranian Conference on Electrical Engineering and Computer Science (ICEESC), 2022.
Agarwal K, Jegadeesan R, Guo YX, Thakor NV. Wireless power transfer strategies for implantable bioelectronics. IEEE reviews in biomedical engineering. 2017 Mar 16;10:136-61.
Einevoll GT, Kayser C, Logothetis NK, Panzeri S. Modelling and analysis of local field potentials for studying the function of cortical circuits. Nature Reviews Neuroscience. 2013 Nov;14(11):770-85.
Shokrekhodaei M, Quinones S. Review of non-invasive glucose sensing techniques: optical, electrical and breath acetone. Sensors. 2020 Feb 25;20(5):1251.
Gabriel C, Peyman A, Grant EH. Electrical conductivity of tissue at frequencies below 1 MHz. Physics in medicine & biology. 2009 Jul 27;54(16):4863.
Dmochowski JP, Datta A, Bikson M, Su Y, Parra LC. Optimized multi-electrode stimulation increases focality and intensity at target. Journal of neural engineering. 2011 Jun 10;8(4):046011.
O’Loughlin D, O’Halloran M, Moloney BM, Glavin M, Jones E, Elahi MA. Microwave breast imaging: Clinical advances and remaining challenges. IEEE Transactions on Biomedical Engineering. 2018 Feb 26;65(11):2580-90.
Raju GG. Dielectrics in electric fields: Tables, Atoms, and Molecules. CRC press; 2017 Jul 28.
La Gioia A, Porter E, Merunka I, Shahzad A, Salahuddin S, Jones M, O’Halloran M. Open-ended coaxial probe technique for dielectric measurement of biological tissues: Challenges and common practices. Diagnostics. 2018 Jun 5;8(2):40.
.
