Study Status: Terminated
Recruit Status: Terminated
Study Type: Interventional
Official Title: A Multi-Center, Open-Label, Dose-Finding, Feasibility Study of Optison in Contrast Enhanced U/S for the Detection of Carotid Artery Disease
Brief Summary: The purpose of this study is to find the optimal dose from 3 different dose levels - 0.15 mL, 0.5 mL and 1.5 mL of Optison in assessing the presence of disease of the carotid arteries when comparing pre-contrast to post-contrast ultrasound (U/S) by dose group.