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Wideband Optical Detector of Ultrasound for Medical Imaging Applications
Published on: May 11, 2014
Coded excitation using biphase-coded pulse with mismatched filters for high-frequency ultrasound imaging
Chang-Hong Hu1, Ruibin Liu, Qifa Zhou
1Biomedical Engineering Department and NIH Transducer Resource Center, University of Southern California, Los Angeles, CA 90089, USA. changhoh@usc.edu
Ultrasonics
|May 23, 2006
Summary
This study introduces phase-coded excitation and mismatched filter compression for high-frequency ultrasound imaging. This technique significantly improves signal-to-noise ratio and reduces sidelobe levels for clearer imaging.
Area of Science:
- Ultrasound Imaging
- Signal Processing
- Medical Physics
Background:
- High-frequency ultrasound imaging is crucial for detailed visualization.
- Traditional methods face challenges with signal clarity and sidelobe interference.
- Optimizing signal processing is key to enhancing image quality.
Purpose of the Study:
- To present a novel scheme using phase-coded excitation and mismatched filter compression.
- To improve signal-to-noise ratio (SNR) and reduce peak-sidelobe-level (PSL) in ultrasound imaging.
- To validate the technique through simulations and experimental studies.
Main Methods:
- Utilized biphase-coded pulses for transducer excitation.
- Employed mismatched filters optimized for minimizing peak-sidelobe-level (PSL).
- Conducted simulations and experimental validations.
Main Results:
- Simulations showed potential sidelobe reduction below -90 dB with minimal SNR decrease (<1 dB).
- Experiments using Barker-13 code achieved approximately 14 dB SNR improvement.
- Experimental results demonstrated a sidelobe level of -40 dB.
Conclusions:
- The proposed scheme effectively enhances SNR and reduces sidelobe levels in high-frequency ultrasound.
- Mismatched filter compression offers significant advantages over matched filters alone.
- This technique holds promise for advancing ultrasound imaging resolution and diagnostic capabilities.
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