The use of video technology to quantify blood vessel mechanics was pioneered by Living Systems Instrumentation founder, Dr. William (Bill) Halpern. In the early 1980’s, Bill and colleagues (Halpern, Osol, and Coy. Annal Biomed Engineering 12: 463-479, 1984) described the first video dimension analyzer to automatically track lumen diameter and wall thickness in real-time. Today, we continue to offer this time-proven technology to study blood vessel function. Our video dimension analyzer (VDA-10) is the backbone of our video instrumentation. We also offer cameras, monitors, and other accessories to facilitate the study of blood vessel function.