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A new methodology to analyze time sequences of ultrasound images

Abstract : The [act that ultrasound scan lines are acquired in polar coordinates creates an important anisotropy in spatial resolution. The geometric transformation (called scan correction) w hich transforms the data from a polar representation to the correct cartesian representation is usually applied through a bilinear interpolation or Bresenham's scheme. We show in this paper the limitations of these schemes which do not account for the varying resolution of the data, and we propose an original method which consists in computing the scan-conversion with a low-pass filtering of the cartesian image applied directly ta the available polar data. We then generalize this approach to extract edges at various resolutions and show how to use these edges to track sorne important moving structures through a dynamic temporal sequence. This is done by combining a refined edge detection (using temporal information) with classical deformable models (snakes). We present our results on a temporal sequence of 24 ultrasound images of the beating heart.
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Submitted on : Wednesday, May 24, 2006 - 5:38:17 PM
Last modification on : Friday, February 4, 2022 - 3:10:08 AM
Long-term archiving on: : Tuesday, April 12, 2011 - 9:35:18 PM


  • HAL Id : inria-00075171, version 1



Isabelle Herlin, Nicholas Ayache. A new methodology to analyze time sequences of ultrasound images. [Research Report] RR-1390, INRIA. 1991. ⟨inria-00075171⟩



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