Advertisement

Dynamic Measurements of Soft Tissue Viscoelastic Properties with a Torsional Resonator Device

  • Davide Valtorta
  • Edoardo Mazza
Part of the Lecture Notes in Computer Science book series (LNCS, volume 3217)

Abstract

A new method for measuring the mechanical properties of soft biological tissues is presented. Dynamic testing is performed by using a torsional resonator, whose free extremity is in contact with a material sample. An analytical model of a semi-infinite, homogenous, isotropic medium is used to model the shear wave propagation in the material sample and allows determining the complex shear modulus of the soft tissue. By controlling the vibration amplitude, shear strains of less than 0.2% are induced in the tissue so that the material response can be assumed to be linear viscoelastic. Experiments are performed at different eigenfrequencies of the torsional oscillator and the complex shear modulus is characterized in the range 1-10 kHz. First in vitro experiments on bovine liver confirmed the sensitivity of the proposed technique. The experiment does not damage the soft tissue and allows a fast and local measurement, these being prerequisites for future applications in-vivo during open surgery.

Keywords

Radiation Pattern Bovine Liver Soft Biological Tissue Complex Shear Modulus Resonance Frequency Shift 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

References

  1. 1.
    Szekely, G., Brechbüler, C., Hutter, R., Rhomberg, A., Schmidt, P.: Modelling of soft tissue deformation for laparoscopic surgery simulation, medical image computi ngand computer-assisted intervention. In: Wells, W.M., Colchester, A.C.F., Delp, S.L. (eds.) MICCAI 1998. LNCS, vol. 1496, pp. 550–561. Springer, Heidelberg (1998)Google Scholar
  2. 2.
    Fung, Y.C.: Elasticity of soft tissues in simple elongation. Am. J. Physiol. 213, 1532 (1967)Google Scholar
  3. 3.
    Snedeker, J.G., Bar-Bezat, M., Niederer, P., Schmidlin, F.R., Farshad, M.: Failure behavior of the kidney; quasi-static comparison with human tissue, impact tests on porcine organs, and comparison with a human kidney finite element model. Submitted to Journal of Biomechanics (2004)Google Scholar
  4. 4.
    Miller, K., Chinzei, K., Orssengo, G., Bednarz, P.: Mechanical properties of brain tissue in vivo: experiment and computer simulation. J. of Biomech. 33(11), 1369–1376 (2000)CrossRefGoogle Scholar
  5. 5.
    Ottensmeyer, M.P., Salisbury Jr., J.K.: In Vivo Data Acquisition Instrument For Solid Organ Mechanical Property Measurement. In: MICCAI 2001, pp. 975–982 (2001)Google Scholar
  6. 6.
    Vuskovic, V.: Device for in-vivo measurement of mechanical properties of internal human soft tissues. Diss. ETH 14222 (2001)Google Scholar
  7. 7.
    Nava, A., Mazza, E.: Determination of the mechanical properties of soft human tissues through aspiration experiments. In: MICCAI 2003 Proc. (2003)Google Scholar
  8. 8.
    Nasseri, S., Bilston, L.E., Phan-Thien, N.: Viscoelastic properties of pig kidney in shear, experimental results and modeling. Rheol. Acta. 41, 180–192 (2002)CrossRefGoogle Scholar
  9. 9.
    Arbogast, K.B., Thibaut, K.L., Scott Pinheiro, B., Winey, K.I.: A high frequencyshear device for testing soft biological tissues. J. Biomechanics 30(7), 757–759 (1997)CrossRefGoogle Scholar
  10. 10.
    Kalanovic, D., Ottensmeyer, M.P., Gross, J., Gerhardt, B., Dawson, S.I.: Independent testing of Soft tissue viscoelasticity using indention and rotary shear deformation. In: Medicine Meets Virtual Reality, pp. 137–143. IOS Press, Amsterdam (2003)Google Scholar
  11. 11.
    Nava, A., Valtorta, D., Mazza, E.: Experimental determination of the mechanical properties of soft biological tissues. In: Proc. 9th Intl. Conf. on the Mechanical Behaviour of Materials, Geneva, Switzerland (2003)Google Scholar
  12. 12.
    Robertson, I.A.: On a proposed determination of the shear modulus of an isotropic elastic half-space by forced torsional oscillations of a circular disc. Appl. Sci. Res. 17, 305–312 (1967)CrossRefGoogle Scholar
  13. 13.
    Sagoci, H.F.: Forced torsional oscillations of an elastic half-space II. J. of Appl. Phys. 15, 655–662 (1944)zbMATHCrossRefMathSciNetGoogle Scholar
  14. 14.
    Dorn, G.A.: Radiation impedance and radiation patterns of torsionally vibratingseismic sources: Ph.D. thesis, Univ. of California, Berkeley (1980) Google Scholar
  15. 15.
    Sayir, M., Goodbread, J., Häusler, K., Dual, J.: Method and device for measuring the characteristics of an oscillating system. Pat. Corp. Treat. PCT/EP95/00761 (1995)Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2004

Authors and Affiliations

  • Davide Valtorta
    • 1
  • Edoardo Mazza
    • 1
  1. 1.Institute of Mechanical SystemsETH ZurichZurichSwitzerland

Personalised recommendations