An ablation probe for treating and imaging body tissue includes an ablation electrode tip including an ablation electrode configured for delivering ablation energy to body tissue. A plurality of acoustic openings are disposed through the ablation electrode tip. A plurality of ultrasonic imaging sensors are positioned inside the ablation electrode tip. The ultrasonic imaging sensors are configured to transmit ultrasonic waves through the acoustic openings. A plurality of flex circuits are each electrically connected to one of the plurality of ultrasonic imaging sensors.