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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics


  • Editor: Gregory W. Faris
  • Vol. 2, Iss. 6 — Jun. 13, 2007

Characterizing image quality in a scanning laser ophthalmoscope with differing pinholes and induced scattered light

Jennifer J. Hunter, Christopher J. Cookson, Marsha L. Kisilak, Juan M. Bueno, and Melanie C.W. Campbell  »View Author Affiliations

JOSA A, Vol. 24, Issue 5, pp. 1284-1295 (2007)

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We quantify the effects on scanning laser ophthalmoscope image quality of controlled amounts of scattered light, confocal pinhole diameter, and age. Optical volumes through the optic nerve head were recorded for a range of pinhole sizes in 12 subjects ( 19 64   years ) . The usefulness of various overall metrics in quantifying the changes in fundus image quality is assessed. For registered and averaged images, we calculated signal-to-noise ratio, entropy, and acutance. Entropy was best able to distinguish differing image quality. The optimum confocal pinhole diameter was found to be 50 μ m (on the retina), providing improved axial resolution and image quality under all conditions.

© 2007 Optical Society of America

OCIS Codes
(110.2960) Imaging systems : Image analysis
(110.3000) Imaging systems : Image quality assessment
(170.1790) Medical optics and biotechnology : Confocal microscopy
(170.3880) Medical optics and biotechnology : Medical and biological imaging
(330.4300) Vision, color, and visual optics : Vision system - noninvasive assessment
(330.4460) Vision, color, and visual optics : Ophthalmic optics and devices

ToC Category:
Instrumentation and Techniques for Retinal Imaging

Original Manuscript: August 22, 2006
Revised Manuscript: November 2, 2006
Manuscript Accepted: November 6, 2006
Published: April 11, 2007

Virtual Issues
Vol. 2, Iss. 6 Virtual Journal for Biomedical Optics

Jennifer J. Hunter, Christopher J. Cookson, Marsha L. Kisilak, Juan M. Bueno, and Melanie C. W. Campbell, "Characterizing image quality in a scanning laser ophthalmoscope with differing pinholes and induced scattered light," J. Opt. Soc. Am. A 24, 1284-1295 (2007)

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