TY - GEN
T1 - Assessment of the depth-dependence of the mechanical parameters of a layered medium using surface excitation and motion measurements on the surface
AU - Aglyamov, Salavat
AU - Wang, Shang
AU - Karpiouk, Andrei
AU - Li, Jiasong
AU - Twa, Michael
AU - Emelianov, Stanislav
AU - Larin, Kirill V.
PY - 2013
Y1 - 2013
N2 - In this study the dynamic behavior of a layered viscoelastic medium in response to the impulsive acoustic radiation force applied to its surface was investigated. To verify our theoretical model, experiments were performed using tissue-like gel-based phantoms of varying mechanical properties. A 3.5 MHz single-element focused transducer was used to apply the radiation force at the surface of the phantoms and a phase-sensitive OCT system was used to track the displacements on the phantom surface. The results of this study demonstrate good agreement between theoretical predictions and experimental measurements. It was demonstrated that layers at different depths introduce responses at different frequencies. Therefore, the proposed model in combination with spectral analysis can be used to evaluate depth dependant distribution of the mechanical properties based the measurements on the tissue surface.
AB - In this study the dynamic behavior of a layered viscoelastic medium in response to the impulsive acoustic radiation force applied to its surface was investigated. To verify our theoretical model, experiments were performed using tissue-like gel-based phantoms of varying mechanical properties. A 3.5 MHz single-element focused transducer was used to apply the radiation force at the surface of the phantoms and a phase-sensitive OCT system was used to track the displacements on the phantom surface. The results of this study demonstrate good agreement between theoretical predictions and experimental measurements. It was demonstrated that layers at different depths introduce responses at different frequencies. Therefore, the proposed model in combination with spectral analysis can be used to evaluate depth dependant distribution of the mechanical properties based the measurements on the tissue surface.
KW - Acoustic radiation force
KW - Elastography
KW - Layered medium
KW - Viscoelasticity
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U2 - 10.1109/ULTSYM.2013.0320
DO - 10.1109/ULTSYM.2013.0320
M3 - Conference contribution
AN - SCOPUS:84894340251
SN - 9781467356862
T3 - IEEE International Ultrasonics Symposium, IUS
SP - 1252
EP - 1255
BT - 2013 IEEE International Ultrasonics Symposium, IUS 2013
T2 - 2013 IEEE International Ultrasonics Symposium, IUS 2013
Y2 - 21 July 2013 through 25 July 2013
ER -