RIGHT:,1.  Mild heterogeneous plaque seen in common carotid artery.,2.  Moderate heterogeneous plaque seen in the bulb and internal carotid artery.,3.  Severe heterogeneous plaque seen in external carotid artery with degree of stenosis around 70%.  ,4.  Peak systolic velocity is normal in common carotid, bulb, and internal carotid artery.,5.  Peak systolic velocity is 280 cm/sec in external carotid artery with moderate spectral broadening.,LEFT: , ,1.  Mild heterogeneous plaque seen in common carotid artery and external carotid artery.,2.  Moderate heterogeneous plaque seen in the bulb and internal carotid artery with degree of stenosis less than 50%.,3.  Peak systolic velocity is normal in common carotid artery and in the bulb.,4.  Peak systolic velocity is 128 cm/sec in internal carotid artery and 156 cm/sec in external carotid artery.,VERTEBRALS:,  Antegrade flow seen bilaterally.cardiovascular / pulmonary, carotid ultrasound, antegrade flow, peak systolic velocity, bulb, carotid artery, homogeneous plaque, plaque, spectral broadening, bulb and internal carotid, velocity is normal, common carotid artery, internal carotid artery, external carotid artery, internal carotid, external carotid, peak systolic, systolic velocity, artery, carotid, ultrasound, velocity, heterogeneous,