Measurement Environment for Acoustic Properties for Ultrasound Computed Tomography

by Julia Koppenhöfer

Friday Oct 9, 2020, 11:00 AM → 11:45 AM Europe/Berlin

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Lecture on the master thesis:   Measurement Environment for Acoustic Properties for Ultrasound Computed Tomography

 
Abstract:
The IPE is developing an ultrasound computed tomography (USCT) device for the early detection of breast cancer. Simulations reduce the necessity of prototyping, making the improvement of the USCT device more time- and cost-efficient. Such simulations require acoustic properties of all materials which are used, or considered to be used, in the transducers. For most materials of interest, there are no literature values. A measurement environment was developed with which acoustic properties can be measured. The speed of sound and acoustic impedance can be determined with a combined systematic and statistical uncertainty of below 1.5%. The measurement environment features automated data acquisition and evaluation via MATLAB routines. Automated signal processing steps compensate low SNR, enabling an equal accuracy for a wide range of materials, including those with high attenuation.