For determination of the accuracy of the co-registration feature, and the accuracy and precision of the length measurements, a flexible phantom was used in order to simulate an artery and enable simulation of the cardiac motion. The sample size for testing the co-registration algorithm was 108 samples (each sample was defined as a landmark). The resultant mean of the absolute distance accuracy was 0.995 mm with a standard deviation of 0.809 mm. The statistical validation in phantoms, resulted in an accuracy of 1.12 mm, meeting the original specification.