AUTOMATIC CALIBRATION FOR 3-D FREE-HAND ULTRASOUND
Richard Prager, Robert Rohling, Andrew Gee and Laurence Berman
3-D free-hand ultrasound is a new imaging technique which is rapidly finding clinical applications. A position sensing device is attached to a conventional ultrasound probe, so that as B-scans are acquired they can be labelled with their relative positions and orientations. This allows the B-scans to be inserted into a 3-D voxel array, which can then be visualised using any-plane slicing, volume rendering or surface rendering. A key requirement of all free-hand imaging systems is calibration: determining the position and orientation of the B-scan with respect to the position sensor. This is typically a lengthy and tedious process, which may need repeating every time a sensor is mounted on a probe. This paper describes a new calibration technique, which takes only a few minutes to perform and produces more accurate and repeatable results than all previously published alternatives.
[1.7 MBytes compressed PostScript, 28 pages]
If you have difficulty viewing files that end
which are gzip compressed, then you may be able to find
tools to uncompress them at the gzip
If you have difficulty viewing files that are in PostScript, (ending
'.ps.gz'), then you may be able to
find tools to view them at
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.