Abstract
In vivo characterization of soft tissue is a key step towards accurate biomechanical simulation enabling planning and intra-operative assisted surgery. This chapter presents the new version of LASTIC, a device measuring soft tissue deformations using a negative pressure. Its capabilities are compared with standard tensile tests on five samples with different elastic properties, i.e. Young modulus, from 10 kPa to 1 MPa, in order to estimate its accuracy and define the functional measurement range. Results show that LASTIC overestimates Young modulus by an average of 24% compared to the tensile devices. This error, although rather large, allows a first estimation of the elastic modulus of different materials, especially living tissues, even during surgery. Directions for improvements are given that will allow for better patient-specific biomechanical simulations of soft tissues.
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Acknowledgments
ANR TecSan IDS, Région Rhône-Alpes (projet SIMED, Cluster ISLE), Amandine Dufaug and Luc Maréchal (SYMME), Jérôme Giraud (LSP), Jacques Ohayon (TIMC).
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© 2012 Springer-Verlag Berlin Heidelberg
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Luboz, V. et al. (2012). Validation of a Light Aspiration Device for In Vivo Soft Tissue Characterization (LASTIC). In: Payan, Y. (eds) Soft Tissue Biomechanical Modeling for Computer Assisted Surgery. Studies in Mechanobiology, Tissue Engineering and Biomaterials, vol 11. Springer, Berlin, Heidelberg. https://doi.org/10.1007/8415_2012_123
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DOI: https://doi.org/10.1007/8415_2012_123
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