Thermal holographic patterns for ultrasound hyperthermia

Holograms can shape wavefronts to produce arbitrary acoustic images. In this work, we experimentally demonstrate how holograms controlled thermal patterns in absorbing media at ultrasonic frequencies. Magnetic resonance imaging (MRI)-compatible holographic ultrasound lenses were designed by time-reversal methods and manufactured using 3D-printing. Several measured MRI thermometry a thermographic camera gelatin-milk phantoms an ex vivo liver tissue. The results show that enable spatially heating regions. Increasing the temperature low-cost MRI-compatible transducers might be of great interest for many biomedical applications, such as hyperthermia, where control specific is needed.