An increase in the common carotid artery intima-media thickness is generally considered an early marker of atherosclerosis than if we can through the measurement of carotid intima-media get a plaque score as vascular risk factors this will be very useful in clinical practice .
I agree with Ankush, if you follow the guidelines and use properly softwares such Philips or Quipu's Cardiovascular Suite, IMT, Distensibility and Stiffness measurements are very consistent and reproducible