Validating a low-cost laser speckle contrast imaging system as a quantitative tool for assessing retinal vascular...

Area of Science:

• Ophthalmology
• Biomedical Engineering
• Medical Imaging

Background:

• Diabetic retinopathy progression is difficult to monitor in animal models due to lack of human-like complications.
• Micro-vascular dysfunction precedes many retinal and neurodegenerative diseases.
• Accurate quantification of retinal hemodynamics is crucial for disease monitoring and therapeutic assessment.

Purpose of the Study:

• To develop a cost-effective, non-invasive method for quantifying retinal hemodynamics in rodent models.
• To adapt a commercial fundus camera for laser speckle contrast imaging (LSCI).
• To assess the utility of LSCI for monitoring retinal vascular disease progression.

Main Methods:

• Modification of a commercial fundus camera into a laser speckle contrast imaging (LSCI) system.
• Contrast-free, non-invasive imaging of retinal hemodynamics.
• Application in a rodent model for wide field-of-view analysis.

Main Results:

• Successful modification of a fundus camera into a functional LSCI system.
• Demonstrated ability to quantify relative changes in retinal hemodynamics.
• Enabled wide field-of-view imaging in a rodent model.

Conclusions:

• The developed LSCI system provides a low-cost solution for non-invasive retinal hemodynamic quantification.
• This technique can serve as a valuable diagnostic indicator for retinal vascular diseases.
• It offers a potential outcome measure for therapeutic interventions in ophthalmic research.