title: Improved system for sonographic imaging and biometry of the cornea.
abstract: 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.
authors.affiliation: Margaret M. Dyson Vision Research Institute, Department of Ophthalmology, Cornell University Medical College, New York, New York 10021, USA.
authors.forename: R H
authors.initials: RH
authors.lastname: Silverman
authors.forename: D Z
authors.initials: DZ
authors.lastname: Reinstein
authors.forename: T
authors.initials: T
authors.lastname: Raevsky
authors.forename: D J
authors.initials: DJ
authors.lastname: Coleman
mesh_terms: 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