Nuclear Imaging Equipment Market, By Product Type (Single Photon Emission Computed Tomography (SPECT), Positron Emission Tomography (PET), Hybrid PET-CT, Hybrid SPECT-CT, Hybrid PET-MRI, and Others), By Application (Oncology, Cardiology, Neurology, and Others), By End User (Hospitals and clinics, Diagnostic imaging centers, Research institutes, and Others), By Geography (North America, Europe, Asia Pacific, Latin America, Middle East and Africa)