Improved system for sonographic imaging and biometry of the cornea.
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.
Silverman
R H
RH
Margaret M. Dyson Vision Research Institute, Department of Ophthalmology, Cornell University Medical College, New York, New York 10021, USA.
Reinstein
D Z
DZ
Raevsky
T
T
Coleman
D J
DJ
D000818:Animals; D001699:Biometry; D003315:Cornea / Q000033:anatomy & histology* / Q000000981:diagnostic imaging*; D004848:Epithelium / Q000033:anatomy & histology / Q000000981:diagnostic imaging; D007091:Image Processing, Computer-Assisted / Q000379:methods*; D011817:Rabbits; D014463:Ultrasonography