Joachim Rasmussen
The non-linear behavior of human tissue causes the speed of sound in an ultrasound wave to vary. Thus, a sinusoidal waveform gets distorted and changed into a sawtooth waveform consisting of higher order harmonics. These harmonics can be used for high contrast images. In synthetic aperture imaging, sound is emitted from the ultrasound transducer in all directions at once enabling improved contrast, resolution, and frame rate for e.g. fast 3D imaging.
The objective is to create an improved ultrasound imaging method by combining synthetic aperture imaging with non-linear ultrasound imaging. This method will be implemented on the Synthetic Aperture Real Time Ultrasound Scanner (SARUS) and used for pre-clinical trials.
The perspective is to provide high resolution, high contrast images without losing frame rate by exploiting the advantages that lie in non-linear and synthetic aperture imaging.
Click here to read the full description for Joachim's project.
About Joachim
Joachim holds a Master in Medical Engineering. He is 27 years old and expects to finish his PhD in 2013. Future plans include working within R&D, in a private company or a research institution.
Currently, Joachim is investigating the performance of a linear-array transducer when conducting non-linear imaging by pulse inversion. This will be done by hydrophone measurements of the output of the transducer in a water tank. Further work includes a new imaging technique on SARUS that combines non-linear imaging with synthetic aperture imaging.
For a full list of publications, please see below