Ultrasound imaging is the most widespread diagnostic imaging modality. In addition to imaging purposes, ultrasound can as well be used for therapy monitoring, e.g. for guiding of biopsies or mapping of temperature during thermal ablation of tissue.
Fraunhofer IBMT´s main department “Ultrasound” is one of Europe´s largest research units dedicated to the field of ultrasound. With a staff of more than 40 engineers and scientists, all aspects of ultrasound technologies from simulations, applications, electronics and ultrasound transducer development are addressed.
The topic of the master thesis will be the development and investigation of methods for generation of complex three dimensional sound fields. In most applications, both from the field of therapy and diagnostics, an ultrasound focus is generated based on geometrical considerations involving the time of flight between the transducer (or its elements) and the chosen focus point. In such cases, an ellipsoidal sound field, whose dimensions depend on the combination of frequency, transducer geometry and focus point will result. The combination of the aforementioned parameters furthermore defines whether there will be secondary focus spots or strong side lobes.
However, in different applications, more complex sound field geometries are required and / or boundary conditions have to be respected. In such cases, the optimal transducer excitation scheme for an expected sound field has to be identified. The goal of the thesis will be the investigation, development and assessment of numerical (optimization) methods for identification of such transducer excitation schemes leading to predefined 2D and/or 3D sound field geometries.
The work will be carried out at Fraunhofer IBMT, Sankt Ingbert, Germany.
- Bachelor of Science (B. Sc.) in physics, mathematics, computer science or engineering
- Programming skills (Matlab and/or C++ / C#)
- Interest in both theoretical and experimental work
- Team player with good communication skills
- Result-oriented work approach
- Enthusiasm for work in a multi-disciplinary team
- Language skills: excellent English and/or German
- Literature study to obtain a clear picture of the problem as well as an overview of the current research in the field
- Familiarization with 3D ultrasound sound propagation and sound field simulation methods
- Development and implementation (Matlab or C++/ C#) of a 2D/3D sound propagation model through different tissues
- Development and implementation of an optimization method for prediction of transducer excitation schemes for given 2D / 3D sound fields
- Experimental validation using existing sound field scanner Systems
In case of identical qualifications preference will be given to severely disabled candidates. We would like to Point out that the Chosen Job title also includes the third gender.
The Fraunhofer-Gesellschaft emphasises gender-independent professional equality.
Fraunhofer is Europe’s largest application-oriented research organization. Our research efforts are geared entirely to people’s needs: health, security, communication, energy and the environment. As a result, the work undertaken by our researchers and developers has a significant impact on people’s lives. We are creative. We shape technology. We design products. We improve methods and techniques. We open up new vistas.
Please send your application, including the reference number (IBMT-2019-24) to:
Fraunhofer-Institut für Biomedizinische Technik IBMT
66280 Sulzbach / Saar
|Kennziffer: IBMT-2019-24||Bewerbungsfrist: 30.09.2020|