Diagnostic Radioisotopes Market, By Radioisotope (Technetium-99m, Thallium-201, Gallium-67, Iodine-123, FDG, Rubidium-82, Others ), By Application (Diagnostic Application and Therapeutic Application), By Imaging Modality (SPECT, PET, Beta Emitters), By Disease Indication (Oncology, Cardiology, Neurology, Thyroid, Orthopedic, Endocrinology, Others), By End User (Hospitals, Specialty Clinics, Diagnostic Centers, Academic & Research Institutes, Others), By Geography (North America, Latin America, Europe, Middle East & Africa, and Asia Pacific)