Akademik Veri Yönetim Sistemi
IEEE Biomedical Circuits and Systems (BIOCAS) 2023 Conference, Toronto, Kanada, 19 - 21 Ekim 2023
Magneto-acousto-electrical tomography (MAET) is an imaging technique that utilizes the measurement of electrical
currents induced by Lorentz's force. This paper investigates the feasibility of applying the pulse compression method to MAET
with magnetic field measurements through numerical studies. A numerical breast model with three tumor inhomogeneities of
different lengths and at different depths from the transducer surface is employed. The ultrasound transducer is excited with
7-bit and 13-bit Barker codes for pulse compression. Additive white Gaussian noise is introduced to the MAET signal sensed by
the receiver coils. The results demonstrate that pulse compression method leads to improvements of 14.77 dB and 17.41 dB in the
signal-to-noise ratio (SNR), compared to the conventional singlecycle excitation, for 7-bit and 13-bit Barker codes, respectively.
A tumor as small as 4 mm x 2 mm can be detected at an SNR of 8.96 dB with the usage of 13-bit Barker code excitation, achieving
an axial resolution of 2 mm. The selected time duration of the transmitted code in the applied Barker code excitation allows for
attaining the same axial resolution as the single-cycle excitation. Index Terms—Magneto-acousto-electrical tomography, pulse
compression, Barker coded excitation, conductivity imaging.