Acoustic Velocity Measurement for Enhancing Laser UltraSound Imaging Based on Time Domain Synthetic Aperture Focusing Technique.
Taeil YoonYounggue KimMuhammad AwaisByeong Ha LeePublished in: Sensors (Basel, Switzerland) (2023)
A method to enhance laser ultrasound (LUS) image reconstruction with the time-domain synthetic aperture focusing technique (T-SAFT) is presented, in which the acoustic velocity is extracted in situ with curve fitting. The operational principle is provided with the help of a numerical simulation, and the confirmation is provided experimentally. In these experiments, an all-optic LUS system was developed by using lasers for both excitation and detection of ultrasound. The acoustic velocity of a specimen was extracted in situ by fitting a hyperbolic curve to its B-scan image. The needle-like objects embedded within a polydimethylsiloxane (PDMS) block and a chicken breast have been successfully reconstructed using the extracted in situ acoustic velocity. Experimental results suggest that knowing the acoustic velocity in the T-SAFT process is important not only in finding the depth location of the target object but also for producing a high resolution image. This study is expected to pave the wave to the development and usage of all-optic LUS for bio-medical imaging.
Keyphrases
- blood flow
- high resolution
- deep learning
- optical coherence tomography
- magnetic resonance imaging
- ultrasound guided
- healthcare
- computed tomography
- working memory
- machine learning
- optic nerve
- magnetic resonance
- loop mediated isothermal amplification
- tandem mass spectrometry
- energy transfer
- fluorescence imaging
- liquid chromatography