| Autor: |
Carp, Stefan A., Guerra III, Arnold, Duque Jr., Samuel Q., Venugopalan, Vasan |
| Předmět: |
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| Zdroj: |
Applied Physics Letters; 12/6/2004, Vol. 85 Issue 23, p5772-5774, 3p, 1 Diagram, 2 Graphs |
| Abstrakt: |
We describe an optoacoustic imaging technique based on time-resolved measurements of laser-induced thermoelastic expansion. Tomographic images of tissue phantoms are formed using such measurements made at several locations following irradiation with a Q-switched Nd:YAG (λ=1064 nm) laser pulse. Our system is based on a modified Mach–Zehnder interferometer that measures surface displacement with a temporal resolution of 4 ns and a displacement sensitivity of 0.3 nm. Images formed from data sets acquired from several highly scattering tissue phantoms provide better than 200 μm resolution and show great promise for high-resolution noninvasive imaging of heterogeneous tissues at depths approaching 1 cm. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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