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Analyzing Pulse Compression Performance and Image Quality Metrics of Different Excitations in MAET With Magnetic
Mehmet Soner Gözü1, Nevzat Güneri Gençer1
1Electrical and Electronics Engineering Department, Middle East Technical University, Ankara, Türkiye.
International Journal for Numerical Methods in Biomedical Engineering
|November 15, 2024
Summary
Pulse compression techniques significantly enhance magneto-acousto-electrical tomography (MAET) imaging performance. Golay codes offer superior contrast-to-noise ratio (CNR) and image quality, improving tumor detection in numerical breast models.
Area of Science:
- Biomedical Imaging
- Medical Physics
- Tomography
Background:
- Magneto-acousto-electrical tomography (MAET) is an emerging imaging modality.
- Improving signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR) is crucial for MAET performance.
- Pulse compression techniques offer potential for signal enhancement.
Purpose of the Study:
- To investigate the efficacy of pulse compression techniques in MAET using numerical simulations.
- To compare the performance of linear frequency modulated (LFM), Barker, and Golay code excitations.
- To evaluate the impact of coil configuration on MAET imaging.
Main Methods:
- Numerical simulations of MAET using a linear phased array (LPA) transducer and breast models.
- Inclusion of tumor targets within numerical breast models.
- Application of LFM, Barker, and Golay code excitations with additive White Gaussian noise.
- Analysis of reconstructed B-mode MAET images and quantitative assessment of SNR and CNR.
Main Results:
- Pulse compression significantly improved MAET image quality compared to single-cycle excitation.
- Golay code excitation yielded the highest CNR improvement (1.9 dB) and superior image quality.
- Barker and Golay codes provided comparable SNR improvements (8.36 and 8.44 dB, respectively), outperforming LFM.
- Coil configuration was found to significantly influence tumor detection capabilities.
Conclusions:
- Pulse compression techniques, particularly Golay codes, enhance MAET performance.
- MAET with pulse compression can detect small tumors (5mm x 2mm) at clinically relevant depths.
- Optimized coil configurations are essential for effective tumor detection using MAET.
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