2. Search methodology
A systemic search on Google scholar, Medline, Science Direct and
Cochrane database resulted in 58042 studies. The search terms used were
“Arterial stiffness”, “Pulse wave velocity”, “cardiovascular risk
assessment”, “intima-media thickness”, “lumen diameter”, “deep
learning ” and “convolutional neural network”. Figure 1. shows the
trend on articles from 2000 to 2021 for arterial stiffness. Further, our
team focused on peer-reviewed journals and filtered the list for
stiffness measurement using image-based techniques. Major research
journals were included while other studies were categorized and 145
studies were finalized for this review.