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.
Ultrasound imaging mostly involves the usage of array transducers involving up to several hundreds of elements. Each of these elements is connected to its own electrical channel of a multichannel electronics system. When the signals of all elements are digitized, different types of beamforming algorithms allow reconstructing images reflecting the distribution of materials / tissues with different acoustic impedances. In the vast majority of medical settings, ultrasound imaging is performed in reflection mode. However, in special cases, tomographic setups have shown to be advantageous, since they not only allow assessing the impedance and scattering properties but as well allow computation sound velocity distributions.
The goal of this thesis is the study of tomographic reconstruction methods as well as the setup and experimental validation of an ultrasound tomography setup. For this purpose, different reconstruction models suitable for tomographic setups (e.g. based on Radon transform, algebraic models, delay and sum beamforming in combination with angular compounding) should be investigated and evaluated on numerical phantom data in a first step. Furthermore, an experimental setup based on an existing multichannel electronics should be developed. A further task will be the acquisition of experimental data to validate the findings from numerical studies.
The work will be carried out at Fraunhofer IBMT, Sankt Ingbert, Germany.
Was Sie mitbringenYour profile:
- You are a master-student in physics, mathematics, computer science or engineering
- You have programming skills (Matlab and/or C++ / C#)
- You are interested in theoretical and experimental work
- You are a team player with good communication skills
- You have a result-oriented work approach
- You are enthusiastic about work in a multi-disciplinary team
- You have language skills: excellent English and/or German
Was Sie erwarten könnenYour tasks:
- Literature study to obtain a clear picture of the problem as well as an overview of the current research in the field
- Familiarization with ultrasound tomography methods
- Development and implementation (Matlab or C++/ C#) of models for simulation of signals from tomographic detection geometries
- Development and implementation of reconstruction methods for the above described geometries
- Development of an experimental setup (including design of mechanics, choice of components) for acquisition of tomographic data based on IBMT´s multichannel ultrasound research electronics
- Acquisition of phantom data for experimental validation of the numerical findings
What you can expect from us:
- Good working atmosphere in a creative team
- Interesting highly interdisciplinary research topic
The position is initially limited for the duration of the master thesis.
Schwerbehinderte Menschen werden bei gleicher Eignung bevorzugt eingestellt.
Wir weisen darauf hin, dass die gewählte Berufsbezeichnung auch das dritte Geschlecht miteinbezieht.
Die Fraunhofer-Gesellschaft legt Wert auf eine geschlechtsunabhängige berufliche Gleichstellung.
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 with reference to the Job ID "IBMT-2021-3" to:
Fraunhofer Institute for Biomedical Engineering (IBMT)
Human Resources Department
|Kennziffer: IBMT-2021-3||Bewerbungsfrist: 31.05.2021|