Abstract
The absorption of nanosecond laser pulses induces rapid thermo-elastic deformation in tissue. A sub-micrometer scale displacement occurs within a few microseconds after the pulse arrival. In this Letter, we investigate the laser-induced thermo-elastic deformation using a 1.5 MHz phase-sensitive optical coherence tomography (OCT) system. A displacement image can be reconstructed, which enables a new modality of phase-sensitive OCT, called thermo-elastic OCT. An analysis of the results shows that the optical absorption is a dominating factor for the displacement. Thermo-elastic OCT is capable of visualizing inclusions that do not appear on the structural OCT image, providing additional tissue type information.
Originalsprache | Englisch |
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Zeitschrift | Optics Letters |
Jahrgang | 42 |
Ausgabenummer | 17 |
Seiten (von - bis) | 3466-3469 |
Seitenumfang | 4 |
ISSN | 0146-9592 |
DOIs | |
Publikationsstatus | Veröffentlicht - 01.09.2017 |