{HEAD ~ An ultrasound probe} includes {TAIL ~ a transducer array} which is moved back and forth to sweep the image plane of the array through a volumetric region for 3D scanning 
includes
{ HEAD ~ An ultrasound probe } includes { TAIL ~ a transducer array } which is moved back and forth to sweep the image plane of the array through a volumetric region for 3D scanning
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH