Abstract
It has previously been demonstrated that using 3-D rather than 2-D ultrasound can increase the accuracy of volume measurements. Unfortunately, the time required to produce them is also increased. While freehand 3-D ultrasound allows complete freedom of movement during scanning, the resulting B-scans are generally resampled onto a low resolution, regular voxel array before subsequent processing — increasing the time even further. In contrast, sequential freehand 3-D ultrasound does not require a voxel array, and hence both the data resolution and the processing times are improved. Such a system is presented here, incorporating three novel algorithms, each operating directly on non-parallel B-scans. Volume is measured using Cubic planimetry, which requires fewer planes than step-section planimetry for a given accuracy. Maximal disc guided interpolation can be used to interpolate non-parallel cross-sections. Regularised marching tetrahedra can then be used to provide a regular triangulation of the zero iso-surface of the interpolated data. The first of these algorithms is presented in detail in this paper.
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Treece, G., Prager, R., Gee, A., Berman, L. (1999). Volume Measurement in Sequential Freehand 3-D Ultrasound. In: Kuba, A., Šáamal, M., Todd-Pokropek, A. (eds) Information Processing in Medical Imaging. IPMI 1999. Lecture Notes in Computer Science, vol 1613. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-48714-X_6
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DOI: https://doi.org/10.1007/3-540-48714-X_6
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