In June 2007 Tyco International Ltd. completed the separation of its healthcare business, which is named Covidien. Mallinckrodt, Inc. is now part of Covidien Ltd. The company makes and distributes products for respiratory care; bulk and dosage pharmaceuticals, primarily for pain relief and addiction therapy; and imaging agents for magnetic resonance, ultrasound, x-ray, and nuclear medicine applications. With worldwide manufacturing and distribution facilities and sales offices, Mallinckrodt, Inc. sells its products worldwide.
Albunex was one of the first marketed ultrasound contrast agents. Currently, Mallinckrodt discontinued the manufacturing and development of ultrasound contrast agents.

Ultrasound Contrast Agents: