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Choroidal perfusion measurements made with optical coherence tomography
Frank I Wu1, Matthew R Glucksberg
1Department of Biomedical Engineering, Northwestern University, Tech Building E310, 2145 Sheridan Road, Evanston, Illinois 60201, USA.
Applied Optics
|March 31, 2005
Summary
We developed a new method using optical coherence tomography to measure choroidal perfusion in rat eyes. This technique successfully correlated with changes in intraocular pressure, offering a novel approach for ocular blood flow research.
Area of Science:
- Ophthalmology
- Biomedical Engineering
- Physiology
Background:
- Choroidal perfusion measurement is challenging due to the choroid's posterior location and overlying retinal vasculature.
- Accurate assessment of choroidal blood flow is crucial for understanding various ocular pathologies.
Purpose of the Study:
- To develop and validate a novel method for measuring choroidal perfusion using optical coherence tomography (OCT).
- To assess the correlation between the developed choroidal perfusion indicator and changes in intraocular pressure (IOP).
Main Methods:
- Modified a speckle imaging algorithm to analyze sequential axial depth scans from rat eyes.
- Utilized OCT to obtain high-resolution images of the posterior eye.
- Measured choroidal perfusion indicator under varying intraocular pressure conditions.
Main Results:
- Successfully obtained an indicator of choroidal perfusion using OCT-based speckle imaging.
- Demonstrated a correlation between the choroidal perfusion indicator and changes in intraocular pressure.
- The method effectively isolated choroidal backscattering events.
Conclusions:
- The modified speckle imaging algorithm applied to OCT data provides a viable method for assessing choroidal perfusion.
- This technique offers a promising tool for studying ocular hemodynamics and the effects of IOP on choroidal blood flow.