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Proceedings Paper

Real-time freehand 3D ultrasound calibration
Author(s): Po-Wei Hsu; Richard W. Prager; Andrew H. Gee; Graham M. Treece
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Paper Abstract

Z-fiducial phantoms allow 3D ultrasound probe calibration with a single B-scan. One of the main difficulties in using this phantom is the need for reliable segmentation of the wires in the ultrasound images, which necessitates manual intervention. In this paper, we have shown how we can solve this problem by mounting a thin rubber membrane on top of the phantom. The membrane is segmented automatically and the wires can be easily located as they are at known positions relative to the membrane. This enables us to segment the wires automatically at the full PAL frame rate of 25Hz, to produce calibrations in real-time, while achieving accuracies similar to those reported in the literature. It takes approximately two minutes to set up the experiment-submerge the phantom in the water bath and locate the phantom in space with a pointer. After this, spatial calibration can be performed in real-time at 25 calibrations per second.

Paper Details

Date Published: 12 March 2007
PDF: 8 pages
Proc. SPIE 6513, Medical Imaging 2007: Ultrasonic Imaging and Signal Processing, 651308 (12 March 2007); doi: 10.1117/12.708115
Show Author Affiliations
Po-Wei Hsu, Univ. of Cambridge (United Kingdom)
Richard W. Prager, Univ. of Cambridge (United Kingdom)
Andrew H. Gee, Univ. of Cambridge (United Kingdom)
Graham M. Treece, Univ. of Cambridge (United Kingdom)


Published in SPIE Proceedings Vol. 6513:
Medical Imaging 2007: Ultrasonic Imaging and Signal Processing
Stanislav Y. Emelianov; Stephen A. McAleavey, Editor(s)

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