Abstract for treece_tr491

Cambridge University Engineering Department Technical Report CUED/F-INFENG/TR491

RF AND AMPLITUDE-BASED PROBE PRESSURE CORRECTION FOR 3D ULTRASOUND

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

August 2004

Anatomical deformation caused by variable probe contact pressure is a significant problem in freehand 3D ultrasound, particularly for high resolution musculoskeletal and breast scans. We have previously published an amplitude-based algorithm for correcting such errors. In this paper, we compare this approach with a novel, elastography-inspired algorithm which works with the higher resolution radio-frequency (RF) signal. The results show that, although the RF-based algorithm is more precise in certain circumstances, both algorithms are able to compensate for probe pressure in 3D ultrasound data. Consequently, freehand 3D ultrasound users who do not have access to the RF signal are still in a position to perform effective probe pressure correction using the readily available video output, as long as this signal is not affected by significant amounts of frame averaging (persistence).


| (ftp:) treece_tr491.pdf | (http:) treece_tr491.pdf | (ftp:) treece_tr491.ps.gz | (http:) treece_tr491.ps.gz |

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.