• Type of project: HiWi/Research Project
  • Contact: ozan.cakiroglu@izfp.fraunhofer.de

In pulse-echo ultrasound imaging, an essential factor to consider is the electro-acoustic properties of ultrasound transducers. These properties define how electrical signals, whether in the form of voltage or current, are converted into pressure waves. The effectiveness of this conversion process significantly influences the accuracy of ultrasound imaging. In this project, the task is to describe the electro-acoustic impulse response of the transducers during the transmission and recording process, ideally each of them separately. After obtaining the impulse response of the transducer during transmission, deconvolution techniques like Wiener deconvolution can be utilized to remove the effect of the electro-acoustic impulse response on the transmission.

Project Phases

  • Literature survey on the electro-acoustic impulse response of the ultrasound transducers
  • Measuring the electro-acoustic impulse response of the transducer elements of the Verasonics system
  • Deconvolution of the electro-acoustic impulse response
  • Documentation
  • T. Gehrke, F. Cheikhrouhou and H. M. Overhoff, “Derivation of the impulse response of ultrasonic transducers by experimental system identification,” IEEE Ultrasonics Symposium, 2005., Rotterdam, Netherlands, 2005, pp. 349-352, doi: 10.1109/ULTSYM.2005.1602866.
  • P. van der Meulen, P. Kruizinga, J. G. Bosch and G. Leus, “Impulse response estimation method for ultrasound arrays,” 2017 IEEE International Ultrasonics Symposium (IUS), Washington, DC, USA, 2017, pp. 1-4, doi: 10.1109/ULTSYM.2017.8092977.

Requirements

  • Basic knowledge in signal processing
  • Matlab or Python programming

Contact Information

  • M.Sc. Ozan Çakıroğlu
  • ozan.cakiroglu@izfp.fraunhofer.de