Abstract: A system is provided for scanning organs in a human body, preferably a human's cardiovascular system more preferably the heart and other arteries. The system includes an extracorporeal opto-acoustic scanning device for scanning from outside of the body and optionally in correlation to inside optic imaging Both comprise a laser or other opto acoustic light and a transducer. The laser being arranged to emit laser pulses towards and/or into the organ system and the transducer being arranged to detect acoustic waves received back from the organ system for imaging the scanned tissue.