1. From the Laboratory of Biorheology and Medical Ultrasonics (E.S., G.C., R.L.M.), CRCHUM (S.F., J.G., J.L.L.), Montréal, Québec, Canada; Departments of Biomedical Sciences (S.F., E.S.), Radiology, Radio-Oncology, and Nuclear Medicine (G.C., R.L.M.), and Medicine (J.G., J.L.L.), and Institute of Biomedical Engineering (G.C., R.L.M.), Université de Montréal, Montréal, Québec, Canada.