Patent ID: 8475442

Claim:
An ultrasonic assembly arranged for attachment to an associated catheter (C), the ultrasonic assembly including: an ultrasonic transducer (T) arranged for attachment on a distal end of the catheter (C), and an adjustable ultrasonic focus mechanism arranged in connection with the ultrasonic transducer (T), the mechanism being arranged to adjust focus of ultrasonic waves generated by the transducer, the adjustable ultrasonic focus mechanism including a fluid focus lens including a first fluid (F 1 ) arranged with an interface (I) to a second fluid (F 2 ) providing an ultrasonic reflection at the interface (I), and first and second electrodes (E, E 1 , E 2 ) arranged in connection with the fluid focus lens so as to allow adjustment of a shape of the interface (I) upon application of an electric voltage (VS) to the first and second electrodes (E, E 1 , E 2 ).