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Proceedings Paper

Assessment of hemoglobin dynamics in traumatic bruises using temperature depth profiling
Author(s): Luka Vidovič; Matija Milanič; Boris Majaron
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Paper Abstract

Perceived color of traumatic bruise depends strongly on depth of the spilled blood, natural skin tone, ambient light conditions, etc., which prevents an accurate and reliable determination of the time of the injury. Pulsed photothermal radiometry (PPTR) allows noninvasive determination of the laser-induced temperature depth profile in human skin. We have applied this technique to characterize dynamics of extravasated hemoglobin in the bruise. Next, we use simple model of mass diffusion and biochemical transformation kinetics to simulate bruise dynamics. By applying Monte Carlo simulation of laser energy deposition, comparison with measured temperature profiles is possible. However, parameters of the model were previously not determined directly. Instead, biologically plausible values were assumed. We show how temperature depth profiling enables accurate monitoring of hemoglobin diffusion and degradation. Parameters of the model, hemoglobin mass diffusivity, hemoglobin degradation time, and skin geometry, can be estimated rather accurately. Derivation of bruise evolution parameters will be a valuable addition to existing bruise age determination techniques.

Paper Details

Date Published: 18 November 2013
PDF: 8 pages
Proc. SPIE 9032, Biophotonics—Riga 2013, 903202 (18 November 2013); doi: 10.1117/12.2044682
Show Author Affiliations
Luka Vidovič, Jožef Stefan Institute (Slovenia)
Matija Milanič, Jožef Stefan Institute (Slovenia)
Boris Majaron, Jožef Stefan Institute (Slovenia)

Published in SPIE Proceedings Vol. 9032:
Biophotonics—Riga 2013
Janis Spigulis; Ilona Kuzmina, Editor(s)

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