Apparatus and method for bone surface-based registration of physical space with tomographic images and for guiding an instrument relative to anatomical sites in the image

Overview

Information

Number
6106464
Application
09/255254
Filing date
02/22/1999
Issue date
08/22/2000
Inventor(s)
Wayne A. Bass, Robert L. Galloway, Jr., Calvin R. Maurer, Jr., Robert J. Maciunas
US Classification
600/439
View at USPTO

Citations

BrainLAB (2)
Saint Louis University (1)
Ultraguide (1)
MARKER, (1)
Sonometrics (1)

Abstract

Abstract

An A-mode ultrasound transducer is tracked in three-dimensions by an optical position tracking system as the transducer is scanned over the skin to generate measurements of bone surface distance from the transducer. A processor correlates the ultrasound data with position and orientation data to generate a three-dimensional physical space model of the bone surface which is registered with an image space model of the bone surface generated from a tomographic image to produce an alignment of the two models. The ultrasound transducer is replaced by an instrument which is also optically tracked. The alignment is used to translate instrument position in physical space to a position in image space for generation on a monitor of a composite display of the instrument and the tomographic image. This composite display can be used to guide positioning and orienting the instrument in physical space with respect to sites of interest observed in the tomographic image on the display.

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Tech Analysis

Class Subclass Type Reference Factor Citation Factor Strength Grant time Early grant (%)
600 439 Emerging Average Seminal Medium Rapid 13.4