1. An ultrasound imaging method comprising: transmitting first ultrasonic energy into a target object to be imaged from a first transducer array positioned in a first acoustic window; receiving first echoes of the first ultrasonic energy with a first single element of a second transducer array positioned in a second acoustic window; obtaining first position information describing a first position of the first single element relative to the first transducer array; constructing a first image of the target object from the first echoes and the first position information; transmitting second ultrasonic energy into the target object to be imaged from the second transducer array positioned in the second acoustic window; receiving second echoes of the second ultrasonic energy with a second single element of the first transducer array; obtaining second position information describing a second position of the second single element relative to the second transducer array; constructing a second image of the target object from the second echoes and the second position information; and averaging the first image and the second image.