- Phase transitions in thin films – with KTH Royal Institute of Technology, Sweden (1995);
- Electron emission properties of composite materials – with Chugoku National Industrial Research Institute, Japan (1995);
- Optical properties of bone – with University of Tartu Institute of Physics, Estonia (1998);
- Infrared spectroscopy and ultrasound imaging of bone tissues – with Martin Luther University of Halle-Wittenberg, Germany (since 1999);
- Optical properties and morphology of bone surface – with Linköping University, Sweden (since 1998);
- Electrical properties of bone – with Royal College, London, UK (since 2000);
- Properties of thin films of silicon oxide and nitride – with Tel Aviv University, Israel (2002);
- Development of new bioceramics – with partners of PERCERAMICS project (2004-2007);
- Respiratory motion analysis of scoliosis patients – with Sahlgrenska University Hospital, University of Gothenburg and KTH Royal Institute of Technology, Sweden (since 2011).
- Annual courses “Radiation protection and safety in medicine” – with the International Atomic Energy Agency (since 1998);
- Joint Baltic Master’s Programme “Biomedical Engineering and Physics” – with Royal College, London (UK), Linköping University (Sweden), Kaunas University of Technology (Lithuania), Tallinn University of Technology (Estonia), University of Tartu (Estonia), University of Latvia (Latvia);
- Baltic regional education and training programme for radiation protection and safety – with Swedish Radiation Protection Institute (Sweden), STUK (Finland), national radiation protection organizations (Estonia, Lithuania, Latvia).
- Chugoku National Industrial Research Institute, Japan (1995) – 1 staff member;
- Martin Luther University of Halle-Wittenberg, Germany (since 1998) – exchange of lecturers and students;
- Linköping University, Sweden (since 1998) – exchange of lecturers and students;
- Royal College, London, UK (since 1996) – 2 staff members;
- Helsinki University of Technology, Finland (1997) – 1 staff member;
- University of Florence, Italy (since 2000) – exchange of lecturers and students;
- Uppsala University, Sweden (2004) – 2 staff members;
- International Atomic Energy Agency, Royal College of London, UK (2005) – 2 staff members.