Application-level Molecular Imaging Agents segmentation reveals a market strongly anchored in oncology, which captures roughly 42%_ of global demand. The dominance stems from the clinical need to stage tumours, detect recurrence early, and monitor response to immuno-oncology therapies; PET tracers such as 18F-FDG and 68Ga-PSMA have become standard-of-care, making this the largest revenue contributor. Neurology accounts for 27%_, propelled by rising dementia prevalence and the regulatory validation of amyloid and tau PET ligands that enable definitive Alzheimer’s diagnosis before symptom onset. Cardiology, representing 19%_, is driven by the shift toward non-invasive myocardial perfusion PET and fatty-acid analogues that quantify viable myocardium, reducing unnecessary catheterisations. Finally, other indications—including infection/inflammation, thyroid, and rare neuroendocrine lesions—collectively generate 12%_; while fragmented, growth here is accelerating as novel receptor-targeted tracers transition from academic sites to commercial radiopharmacies.