Abstract
Differential imaging may be useful for understanding pathologies of the choroid. We use a prototype scanning laser ophthalmoscope capable of simultaneous multiple wavelength imaging to record fundus images. The advantages of simultaneous acquisition compared to serial acquisition are, reduced image capture times, and image registration is not required.
The system is run under non-confocal conditions in using slit apertures with a width of up to 600 μm. The laser lines launched into the SLO were the 633 nm line of a HeNe- laser, and the 815 nm line from a tunable (740 nm to 840 nm) cw Ti:Sapphire-laser. The difference in absorption at these two wavelengths is used to produce a differential image. We compare conventional imaging with differential spectral imaging for viewing the choroidal vessels. Qualitative results show the contrast of choroidal vessels in differential imaging is improved compared with normal imaging in the region of the optic disk and for the level of pigmentation in the subjects examined.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Eisner AE, Hartnett, ME, Weiter J, Buzney SM, Burns S. Advantages of infrared imaging in detecting choroidal new vessels. OSA Technical Digest (Vision science and its applications). 1996; 1: 102–105, 1996, (Abstract).
Eisner AE, Burns S, Weiter J, Delori FC. Infrared imaging of sub-retinal structures in the human ocular fundus. Vision Research 1996; 36: 191–205.
Kolb CE, McManus BJ, Nelson DD, Zahniser ZS. Tunable infrared laser differential absorption spectroscopy (TILDAS) monitors for atmospheric trace gases. Lasers and Electro-Optics Society Annual Meeting. IEEE. Piscataway, NJ, USA, pp. 921996.
Reinholz F, Ashman F. Simultaneous three wavelength imaging with a scanning laser ophthalmoscope. Cytometry 1999; 37: 165–170.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2001 Springer Science+Business Media Dordrecht
About this chapter
Cite this chapter
Ashman, R.A., Reinholz, F., Eikelboom, R.H. (2001). Differential imaging in scanning laser ophthalmoscopy. In: Sampaolesi, J.R. (eds) Laser Scanning: Update 1. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-0322-3_36
Download citation
DOI: https://doi.org/10.1007/978-94-010-0322-3_36
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-010-3866-9
Online ISBN: 978-94-010-0322-3
eBook Packages: Springer Book Archive