1. Ultrasound Institute, Kaunas University of Technology, Studentu St. 50, LT-51368 Kaunas, Lithuania
2. Department of Mechanical Engineering, Kaunas University of Technology, Kęstučio g. 27, LT-44312 Kaunas, Lithuania
3. Department of Manufacturing Engineering, Kaunas University of Technology, Kęstučio g. 27, LT-44312 Kaunas, Lithuania