Surgery – Diagnostic testing – Detecting nuclear – electromagnetic – or ultrasonic radiation
Patent
1997-06-19
1998-07-07
Jaworski, Francis
Surgery
Diagnostic testing
Detecting nuclear, electromagnetic, or ultrasonic radiation
600452, A61B 800
Patent
active
057760683
ABSTRACT:
Apparatus is provided for high frequency ultrasound examination of the anterior segment of a patient's eyes. A liquid bath is established about a first eye of the patient to be examined. A fixed ultrasound transducer is placed in contact with the liquid bath and directs the beam of ultrasound energy to the first eye and receives echoes of the ultrasound energy. A fixation source is juxtaposed to the second eye of the patient and displays a fixation target. A controller operates the fixation source to move the fixation target relative to the second eye, while the patient moves the second eye so as to remain focused on the fixation target. The movement of the second eye causes the first eye to move concurrently and enables relative movement between the beam of ultrasound energy and anterior segments of the first eye, while maintaining near orthogonality between the ultrasound beam and the surface of the eye. By tracking the position of the second eye, the position of the first eye, and hence of each pulse/echo sequence, is ascertained, enabling image construction and biometric determinations of the anterior segment anatomy to be performed.
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Reinstein et al. "Corneal Pachymetric Topography", Ophthalmology, vol. 101, 3, Mar. 1994, pp. 432-438.
Coleman Donald Jackson
Najafi David
Reinstein Dan Z.
Silverman Ronald H.
Simoni George
Cornell Research Foundation
Jaworski Francis
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