Interferometric technique to measure shock-induced surface velocities in tissues for the determination of dynamic mechanical properties

Ujwal S. Sathyam; Peter M. Celliers; Luiz Barroca Da Silva

doi:10.1117/12.308153

13 May 1998 Interferometric technique to measure shock-induced surface velocities in tissues for the determination of dynamic mechanical properties

Ujwal S. Sathyam, Peter M. Celliers, Luiz Barroca Da Silva

Author Affiliations +

Proceedings Volume 3254, Laser-Tissue Interaction IX; (1998) https://doi.org/10.1117/12.308153
Event: BiOS '98 International Biomedical Optics Symposium, 1998, San Jose, CA, United States

Abstract

We present an interferometric technique to measure free surface velocities of a tissue phantom when subjected to a high power laser pulse. Such information is useful for the determination of the dynamic mechanical properties of tissues and tissue phantoms. We deliver a 4-nanosecond doubled Nd:YAG laser pulse to a tamped surface of a slab sample and probe the opposite free surface with a HeNe laser beam. The stress-wave induced motion of the rear-surface imparts a Doppler shift to the reflected HeNe probe. We monitor the Doppler shift with a velocity interferometer sensitive to velocities as low as 1 - 2 m/s.

Citation Download Citation

Ujwal S. Sathyam, Peter M. Celliers, and Luiz Barroca Da Silva "Interferometric technique to measure shock-induced surface velocities in tissues for the determination of dynamic mechanical properties", Proc. SPIE 3254, Laser-Tissue Interaction IX, (13 May 1998); https://doi.org/10.1117/12.308153

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