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Hybrid dual frequency transducer / array probe for super-harmonic imaging

In previous work, the advantage of using super-harmonic contrast imaging to visualize the microvasculature in tumors and organs has been demonstrated [1]. This was performed using dual frequency (DF) probes consisting of a high frequency single element transducer from a motorized probe concentric with a low frequency ring [2]. However, mechanically scanned systems have limitations, including single focal zone and slow frame rate, which can be alleviated using array technology. In this work, the design and performance of new hybrid dual frequency transducer/array probes are presented.