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28 October 2013 Method for optodynamic source localization during Er:YAG laser ablation
Georgije Bosiger, Tadej Perhavec, Marko Marincek, Janez Diaci
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Journal of Biomedical Optics, Vol. 18, Issue 10, 100505 (October 2013). https://doi.org/10.1117/1.JBO.18.10.100505
Abstract
We present an improved optodynamic (OD) method which enables measurement of the distance between the OD source on the ablated surface and a piezoelectric sensor above it, with a relative error of about 1%. The method is based on the point explosion model and allows determination of the distance to the OD source and the released energy for each detected OD signal. We estimate the distance and released energy on the basis of two measured OD signal characteristics: the time of flight and the duration of the compressive phase. We show that the finite aperture of the sensor needs to be taken into account to improve measurement accuracy. We present experimental validation of the method using an Er:YAG laser and water as a tissue phantom. We observe an excellent agreement between the measured and theoretical OD signals and between the measured and estimated distances. The method opens the way to practicable implementations of on-line OD monitoring of laser ablation in surgery and medicine.
© 2013 Society of Photo-Optical Instrumentation Engineers (SPIE) 0091-3286/2013/$25.00 © 2013 SPIE
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Georgije Bosiger, Tadej Perhavec, Marko Marincek, and Janez Diaci "Method for optodynamic source localization during Er:YAG laser ablation," Journal of Biomedical Optics 18(10), 100505 (28 October 2013). https://doi.org/10.1117/1.JBO.18.10.100505
Published: 28 October 2013
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KEYWORDS
Sensors
Signal detection
Laser ablation
Distance measurement
Er:YAG lasers
Wave propagation
Error analysis
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