Magnetoacoustic tomography with magnetic induction for high-resolution bioimepedance imaging through vector source reconstruction under the static field of MRI magnet

摘要: Purpose: Magnetoacoustic tomography with magnetic induction (MAT-MI) is an imaging modality to reconstruct the electrical conductivity of biological tissue based on acoustic measurements Lorentz force induced vibration. This study presents feasibility authors' new MAT-MI system and vector source algorithm perform a complete reconstruction distribution real tissues ultrasound spatial resolution. Methods: In present study, using beamformation, point spread functions are designed in object which used estimate distribution. Both numerical studies phantom experiments performed demonstrate merits proposed method. Also, through simulations, full width half maximum function calculated The static field 9.4 T resonance magnet. Results: image beamformation experimental gives reliable ∼1.5 mm resolution corresponding frequency 500 kHz ultrasound. addition, experiment results suggest that under high environment able images tissue-mimicking gel phantoms samples contrast. Conclusions: properties better than 2 at kHz, provide improved contrast for reconstruction.