TY - JOUR AU - Correas, J M; Bridal, L; Lesavre, A; Mejean, A; Claudon, M; Helenon, O TI - Ultrasound contrast agents: properties, principles of action, tolerance, and artifacts JO - Eur Radiol VL - 11 PY - 2001 DO - 10.1007/s003300100940 SP - 1316 EP - 1328 ER -