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Evaluation of Renal Pathology With an Intravenous Ultrasound Contrast Agent

Contrast agents are used widely in most imaging modalities when evaluating renal pathology. Ultrasound contrast agents have the potential to yield increased information in sonography of renal masses. This article presents four cases of patients with various renal pathology and the impact of the addition of an ultrasound contrast agent (Definity, DuPont Pharmaceuticals, North Billerica, MA) on the imaging studies. The value of using pulse cancellation software to allow for gray-scale sonographic evaluation is discussed.