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Toward feedback temperature control for retinal laser treatment
Author(s): H. S. Abbas; C. Kren; V. Danicke; C. Herzog; R. Brinkmann
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Paper Abstract

Automatic feedback temperature control has been proposed recently as a promising approach for retinal thermal laser therapy. It can regulate the retinal temperature increase to a pre-specified desired value, which can provide homogeneous temperature increase at the different irradiation sites as the feedback control can automatically set the required corresponding laser power. Therefore, we can avoid over treatment and its consequences due to the manual setting often provided by ophthalmologists in practice. However, in order to achieve successful automatic treatment, a mathematical model for the process is necessary to synthesize the feedback control algorithm. In this study, we develop a model, which can describe the dynamical relation between the temperature increase and the applied laser power at the different irradiation sites. We adopt the system identification approach, which is used to build mathematical models for dynamical systems based on experimental measurements. The identified model here can fit the rear-time data with an accuracy of about 91 ± 1.91%, which indicates its validity for effective feedback control. The control algorithm based on such models can achieve consistent irradiation time of about 50 ms in simulation

Paper Details

Date Published: 22 July 2019
PDF: 3 pages
Proc. SPIE 11079, Medical Laser Applications and Laser-Tissue Interactions IX, 110790B (22 July 2019); doi: 10.1117/12.2527169
Show Author Affiliations
H. S. Abbas, Medizinisches Laserzentrum Lübeck GmbH (Germany)
Univ. zu Luebeck (Germany)
C. Kren, Medizinisches Laserzentrum Lübeck GmbH (Germany)
Univ. zu Lübeck (Germany)
V. Danicke, Medizinisches Laserzentrum Lübeck GmbH (Germany)
Univ. zu Lübeck (Germany)
C. Herzog, Univ. zu Lübeck (Germany)
R. Brinkmann , Medizinisches Laserzentrum Lübeck GmbH (Germany)
Univ. zu Lübeck (Germany)


Published in SPIE Proceedings Vol. 11079:
Medical Laser Applications and Laser-Tissue Interactions IX
Lothar D. Lilge; Carsten M. Philipp, Editor(s)

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