Advertisement

Image Quality Improvement Performance Using the Synthetic Aperture Focusing Technique Data

A Wavelet Application
  • P. AcevedoEmail author
  • A. Durán
  • E. Rubio
Conference paper
Part of the Acoustical Imaging book series (ACIM, volume 30)

Abstract

A wavelet application to improve image quality using the Synthetic Aperture Focusing Technique (SAFT) Data is presented. This Application is based on a wavelet package analysis applied to RF signals sensed by transducers in a scanning process. SAFT is performed for each level in the wavelet package decomposition tree. For image forming, an addition and delay algorithm with focusing on pixels has been implemented, and calculations have been carried out using the Matlab toolbox. This method has been applied to image forming for a point reflector simulated using the Field II toolbox and for a phantom constructed using nine acrylic reflectors. Obtained results show that axial resolution is improved and formed images have a better signal-noise ratio.

Keywords

Synthetic aperture focusing Ultrasonic imaging Data processing Wavelets 

Notes

Acknowledgements

The authors acknowledge the support of DGAPA-UNAM (PAPIIT IN-109207).

References

  1. 1.
    Frazier, H., O’Brien, W.D.: Synthetic aperture techniques with a virtual source element. IEEE Trans. Ultrason. Ferroelect. Freq. Contr. 45(1), 196–207 (1998)CrossRefGoogle Scholar
  2. 2.
    Walker, J.S.: A primer on Wavelets and their scientific application, University of Wisconsin-Eua Claire, CHAPMAN & HALL/CRC (1999)Google Scholar
  3. 3.
    Jensen, J.A., Svendsen, N.B.: Calculation of pressure fields from arbitrarily shaped, apodized, and excited ultrasound transducer. IEEE Trans. Ultrason. Ferroelect. Freq. Contr. 39, 262–267 (1992)CrossRefGoogle Scholar
  4. 4.
    Jensen, J.A., Svendsen, N.B.: Field: A program for simulating ultrasound systems. Med. Biol. Eng. Comp., 10th Nordic-Baltic Conference on Biomedical Imaging, vol. 4, Supplement1, Part 1: 351-353 (1996b)Google Scholar
  5. 5.
    Onda Corporation. Available: http://www.ondacorp.com/index1.html

Copyright information

© Springer Science+Business Media B.V. 2011

Authors and Affiliations

  1. 1.Universidad Nacional Autónoma de México, DISCA-IIMASMéxicoMéxico

Personalised recommendations