Imaging Sodium and Lymphatics in Lymphedema

The investigators will identify participants undergoing clinically-indicated interventions that they are already receiving for their routine clinical management (complete decongestive physical therapy). They will make no evaluation of the efficacy of these procedures, but rather will test fundamental hypotheses regarding lymphatic clearance of tissue sodium.

The standard imaging protocol entails noninvasive magnetic resonance imaging techniques including sodium and lymphatic angiography.