Search Contact information
University of Cambridge Home Department of Engineering
University of Cambridge > Engineering Department > Machine Intelligence Lab

Abstract for treece_tr577

Cambridge University Engineering Department Technical Report CUED/F-INFENG/TR577

FREEHAND ULTRASOUND ELASTOGRAPHY WITH A 3D PROBE

G.M. Treece, J.E. Lindop, R.W. Prager and A.H. Gee

May 2007

This paper presents the first near-real-time freehand ultrasound elastography system using a threedimensional (3D) mechanical probe. Acquisition is complete within 2 seconds, and only an additional 20 seconds are required for generation of a full 3D strain volume. The strain is axial, with estimates of lateral and elevational tissue movement used to increase the accuracy of the axial strain measurement. This is the first time all system components have been extended to 3D, i.e. 3D windows are used to track displacement, which is tracked in all directions, and 3D kernels are used for least squares gradient estimates. Normalisation of the freehand 3D strain data is also applied across the whole volume. The system is tested using a novel research 3D RF system with real time control over the stepper motor driving the ultrasound probe, and real-time streaming of RF ultrasound data. The paper proves the concept rather than making significant comments on the achievable accuracy in 3D, though we demonstrate that the high performance of the 2D techniques which we extend appears to carry through to in vitro and in vivo 3D data. The result is a fast and high resolution 3D image of normalised axial strain.


(ftp:) treece_tr577.pdf (http:) treece_tr577.pdf

If you have difficulty viewing files that end '.gz', which are gzip compressed, then you may be able to find tools to uncompress them at the gzip web site.

If you have difficulty viewing files that are in PostScript, (ending '.ps' or '.ps.gz'), then you may be able to find tools to view them at the gsview web site.

We have attempted to provide automatically generated PDF copies of documents for which only PostScript versions have previously been available. These are clearly marked in the database - due to the nature of the automatic conversion process, they are likely to be badly aliased when viewed at default resolution on screen by acroread.

© 2005 Cambridge University Engineering Dept
Information provided by milab-maintainer