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Optimization of low-level light therapy's illumination parameters for spinal cord injury in a rat model
Author(s): Ali Shuaib; Ali Bourisly
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Paper Abstract

Spinal cord injury (SCI) can result in complete or partial loss of sensation and motor function due to interruption along the severed axonal tract(s). SCI can result in tetraplegia or paraplegia, which can have prohibitive lifetime medical costs and result in shorter life expectancy. A promising therapeutic technique that is currently in experimental phase and that has the potential to be used to treat SCI is Low-level light therapy (LLLT). Preclinical studies have shown that LLLT has reparative and regenerative capabilities on transected spinal cords, and that LLLT can enhance axonal sprouting in animal models. However, despite the promising effects of LLLT as a therapy for SCI, it remains difficult to compare published results due to the use of a wide range of illumination parameters (i.e. different wavelengths, fluences, beam types, and beam diameter), and due to the lack of a standardized experimental protocol(s). Before any clinical applications of LLLT for SCI treatment, it is crucial to standardize illumination parameters and efficacy of light delivery. Therefore, in this study we aim to evaluate the light fluence distribution on a 3D voxelated SCI rat model with different illumination parameters (wavelengths: 660, 810, and 980 nm; beam types: Gaussian and Flat; and beam diameters: 0.1, 0.2, and 0.3 cm) for LLLT using Monte Carlo simulation. This study provides an efficient approach to guide researchers in optimizing the illumination parameters for LLLT spinal cord injury in an experimental model and will aid in quantitative and qualitative standardization of LLLT-SCI treatment.

Paper Details

Date Published: 8 February 2018
PDF: 6 pages
Proc. SPIE 10477, Mechanisms of Photobiomodulation Therapy XIII, 1047703 (8 February 2018); doi: 10.1117/12.2289054
Show Author Affiliations
Ali Shuaib, Kuwait Univ. (Kuwait)
Ali Bourisly, Kuwait Univ. (Kuwait)


Published in SPIE Proceedings Vol. 10477:
Mechanisms of Photobiomodulation Therapy XIII
Michael R. Hamblin; James D. Carroll; Praveen Arany, Editor(s)

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