Motion of a solid sphere in a viscoelastic medium in response to applied acoustic radiation force: Theoretical analysis and experimental verification.
The motion of a rigid sphere in a viscoelastic medium in response to an acoustic radiation force of short duration was investigated. Theoretical and numerical studies were carried out first. To verify the developed model, experiments were performed using rigid spheres of various diameters and densities embedded into tissue-like, gel-based phantoms of varying mechanical properties. A 1.5 MHz, single-element, focused transducer was used to apply the desired radiation force. Another single-element, focused transducer operating at 25 MHz was used to track the displacements of the sphere. The results of this study demonstrate good agreement between theoretical predictions and experimental measurements. The developed theoretical model accurately describes the displacement of the solid spheres in a viscoelastic medium in response to the acoustic radiation force.
Aglyamov
Salavat R
SR
Department of Biomedical Engineering, University of Texas at Austin, Austin, Texas 78712-0238, USA.
Karpiouk
Andrei B
AB
Ilinskii
Yurii A
YA
Zabolotskaya
Evgenia A
EA
Emelianov
Stanislav Y
SY
D000162:Acoustics; D001696:Biomechanical Phenomena; D003287:Contrast Media; D003952:Diagnostic Imaging; D004548:Elasticity; D005583:Fourier Analysis; D005782:Gels; D006801:Humans; D045423:Microbubbles; D008962:Models, Theoretical; D009038:Motion; D019047:Phantoms, Imaging; D013314:Stress, Mechanical; D014159:Transducers; D014464:Ultrasonic Therapy; D014463:Ultrasonography; D014783:Viscosity
D003287:Contrast Media; D005782:Gels