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Journal of Ultrasound in Medicine, Vol 16, Issue 2 117-124, Copyright © 1997 by American Institute of Ultrasound in Medicine

JOURNAL ARTICLE

Improved system for sonographic imaging and biometry of the cornea

R. H. Silverman, D. Z. Reinstein, T. Raevsky and D. J. Coleman
Margaret M. Dyson Vision Research Institute, Department of Ophthalmology, Cornell University Medical College, New York, New York 10021, USA.

We developed a programmable motion system for high-frequency (50 MHz) ultrasonographic imaging of the cornea. The system permits a variety of scanning modes, including arc scans matched to the approximate radius of curvature of the cornea. This approach allows high-precision biometry (+ or - 2 microm) over a much larger region of the cornea than the 3 mm central zone obtainable with conventional rectilinear scanning. Using 60 degree wide meridional arc scans covering each clock-hour of a rabbit cornea, we obtained data over an 8 mm wide central zone and produced maps representing the thickness of the corneal epithelium.




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Copyright © 1997 by the American Institute of Ultrasound in Medicine.