Non-Contact Surface Wave Elastography Using 40 kHz Airborne Ultrasound Surface Motion Camera

The speed of the surface Rayleigh wave, which is related to the viscoelastic properties of the medium, can be measured by non-invasive and non-contact methods. This paper presents a new method for non-contact ultrasound surface wave elastography using airborne ultrasound surface motion camera (AUSMC). To demonstrate and validate the approach the experiments were carried out on different gelatin phantoms of different concentrations (3%, 5%, 8%) and ×12 scaled eye phantom. By studying the dispersion curve of the surface wave speed, shear modulus can be extracted. The study presents the preliminary results that support the capability of the AUSMC system to estimate without contact the shear modulus of semi-infinite media or thin layer over semi-infinite media.