An imaging catheter system is provided, including a hollow lumen having a distal portion, and a plurality of first transducer elements arranged in a first array configured to be received within the distal portion of the hollow lumen. Each of the first transducer elements include a micromachined piezocomposite, and the plurality of first transducer elements is configured to operate at an effective operational frequency of greater than about 30 MHz. A plurality of second transducer elements configured to operate at an effective operational frequency of less than about 15 MHz may be arranged in a second array, each of the second transducer elements including a micromachined piezocomposite, and engaged with the first array. The low frequency array may be operated in a transmit mode and the high frequency array may be operated in a receive mode to facilitate contrast imaging.
