 Contrast enhanced ultrasound imaging CEUS will be performed immediately after Sonazoid administration i.e., lymphosonography to identify the number, location and course of the lymphatic channels LCs and SLNs using a S3000 scanner Siemens Medical Solutions, Mountain View, CA with a high frequency, broad bandwidth linear array. CEUS evaluations will be repeated at 15 minutes, 30 minutes, 1 hour, 2 hours, 4 hours, 6 hours and 24 hours post Sonazoid administration. The safety and tolerability of Sonazoid will be closely monitored throughout this safety and tolerability, dose-finding study. 