Dice-and-fill single element octagon transducers for next generation 3D USCT

Michael Zapf, Patrick Pfistner, Claudio Imbracio Liberman, Koen Van Dongen, Nico De Jong, Benjamin Leyrer, Hartmut Gemmeke, Nicole V. Ruiter
At the Karlsruhe Institue of Technology (KIT), a 3D-Ultrasound Computer Tomography (3D-USCT) medical imaging system for early breast cancer detection is currently developed. With the next generation of 3D-USCT 2.5, the current region of interest (ROI) of 10 x 10 x 10 cm³ shall be increased to 20 x 20 x 20 cm³ to allow reliable imaging results also for bigger female breasts. Therefore, the opening angle (OA) of the future transducers should be increased to approx. 60° at 3 dB while other
more » ... ristics such as bandwidth (BW) and resonance frequency should be preserved or even improved. Based on the current dice-andfill approach in transducer production, optimization is performed on piezoelectric sensor geometry and size, type and structure of matching and backing layer and interconnection technology of the several parts of the transducer.
doi:10.5445/ir/1000080096 fatcat:itb7rdvlvrhbhnwocu4542i7ie