A Closed-Form Differential Formulation for Ultrasound Spatial Calibration

  • Mohammad Najafi
  • Narges Afsham
  • Purang Abolmaesumi
  • Robert Rohling
Part of the Lecture Notes in Computer Science book series (LNCS, volume 7330)

Abstract

Purpose: Calibration is essential in tracked freehand 3D ultrasound (US) to find the spatial transformation from the image coordinates to the reference coordinate system. Calibration accuracy is especially important in image-guided interventions. Method: We introduce a new mathematical framework that substantially improves the US calibration accuracy. It achieves this by using accurate measurements of axial differences in 1D US signals of a multi-wedge phantom, in a closed-form solution. Results: We report a point reconstruction accuracy of 0.3 mm using 300 independent measurements. Conclusion: The measured calibration errors significantly outperform the currently reported calibration accuracies.

Keywords

Ultrasound Image Calibration Technique Ultrasound Beam Translation Parameter Calibration Accuracy 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  • Mohammad Najafi
    • 1
  • Narges Afsham
    • 1
  • Purang Abolmaesumi
    • 1
  • Robert Rohling
    • 1
  1. 1.University of British ColumbiaVancouverCanada

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