Surgery – Truss – Pad
Patent
1993-07-09
1994-03-15
Kamm, William E.
Surgery
Truss
Pad
A61B 810
Patent
active
052938719
ABSTRACT:
An ultrasound system that enables determination of layer thicknesses and contours of a multi-layer organic body includes a transmitter/receiver for obtaining a radio frequency signal from echoes over a plurality of points on the organic surface. Each radio frequency signal is then deconvolved to remove apparatus generated noise and filtered to create an analytic signal that exhibits a magnitude related to an instantaneous rate of arrival of total echo energy received by the transmitter/receiver. Analytic signals from adjacent parallel scans are then cross-correlated and magnitude detected to determine energy peaks to enable accurate determination of echo producing surfaces of each layer of the multi-layer organic body across the plurality of interrogation points. In the application of the invention to Corneal Epithelium Mapping, a pupil monitoring system is included that disables the measurement system if the pupil's gaze wanders so as to cause a diversion of the optical axis.
REFERENCES:
patent: 4676105 (1987-06-01), Matzuk
patent: 4866614 (1989-09-01), Tam
"Comparison of a Computer-Assisted Laser Pachometer With Two Ultrasonic Pachometers in Normal Corneas", Gritz et al., Refractive & Corneal Surgery, vol. 6, Jan./Feb. 1990, pp. 9-14.
"Advances in the Analysis Of Corneal Topography", Wilson et al., Survey of Opthamology, vol. 35, No. 4, Jan./Feb. 1991, pp. 269-277.
"Corneal Thickness Profiles in Rabbits Using and Ultrasonic Pachometer", Chan et al., Investigative Ophthalmology and Visual Science, vol. 24, Oct. 1983, pp. 1408-1410.
"Theoretical Framework For Spectrum Analysis In Ultrasonic Tissue Characterization", Lizzi, et al., J. Acoust. Soc. Am. 73 (4), Apr. 1983, pp. 1366-1373.
"Improved Ultrasonic Detection Using The Analytic Signal Magnitude", Gammell, Ultrasonics, Mar. 1981, pp. 73-76.
"Tissue Characterization With Ultrasound", Greenleaf, editor, CRC Press, 1986, pp. 42-60.
"Determination Of The Corneal Thickness Profile By Optical Pachometry", Edmund, Acta Ophthalmologica, vol. 65, (1987), pp. 147-152.
"Methods of Analysis of Corneal Topography", Klyce et al., Refractive & Corneal Surgery, vol. 5, Nov./Dec. 1989, pp. 368-371.
Coleman Donald J.
Lizzi Frederic L.
Reinstein Dan Z.
Silverman Ronald H.
Cornell Research Foundation Inc.
Kamm William E.
Manuel George
Riverside Research Institute
LandOfFree
System for ultrasonically determining corneal layer thicknesses does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with System for ultrasonically determining corneal layer thicknesses , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System for ultrasonically determining corneal layer thicknesses will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1530771