Lantheus Holdings, Inc. develops, manufactures, and commercializes diagnostic and therapeutic products that assist clinicians in the diagnosis and treatment of heart, cancer, and other diseases worldwide. It provides DEFINITY, a microbubble ultrasound enhancing agent used in ultrasound exams of the heart; TechneLite, a technetium generator for nuclear medicine; Xenon-133 to assess pulmonary function; Neurolite to identify the area within the brain where blood flow has been blocked or reduced due to stroke; Cardiolite, an injectable Tc-99m-labeled imaging agent; Thallium-201 to detect cardiovascular disease; and Gallium-67 to detect various infections and cancerous tumors. The company also offers AZEDRA, a radiotherapeutic to treat adult and pediatric patients; Automated Bone Scan Index that calculates the disease burden of prostate cancer by quantifying the hotspots on bone scans; and Cobalt (Co 57), a non-pharmaceutical radiochemical; RELISTOR for opioid-induced constipation; and PYLARIFY for visualization of lymph nodes, bone, and soft tissue metastases to determine the presence or absence of recurrent and/or metastatic prostate cancer. It also develops flurpiridaz F 18 to assess blood flow to the heart; 1095, a PSMA-targeted iodine-131 labeled small molecule; LMI 1195 for neuroblastoma tumors in pediatric and adults; PYLARIFY AI, an AI-based medical device software to perform standardized quantitative assessment of PSMA PET/CT images in prostate cancer; and leronlimab, an investigational humanized monoclonal antibody. The company serves radio pharmacies, distributors, integrated delivery networks, hospitals, clinics, and group practices. It has strategic partnerships with NanoMab Technology Limited; Bausch Health Companies, Inc.; GE Healthcare Limited; Curium; Bayer AG; CytoDyn Inc.; ROTOP; FUJIFILM; Regeneron Pharmaceuticals, Inc.; and POINT Biopharma US Inc. The company was founded in 1956 and is headquartered in North Billerica, Massachusetts.