The Application dimension of PET/CT Molecular Imaging System segmentation divides the market into oncology, cardiology, neurology, and infection/inflammation uses. Oncology accounts for roughly 55 % of total revenue, driven by high demand for tumor staging, treatment response monitoring, and emerging theranostic workflows. Cardiology contributes about 20 % as clinicians adopt PET/CT for myocardial viability assessment and coronary plaque characterization, which require specialized radiotracers and quantitative analysis. Neurology, representing ~15 % of the market, supports investigations of neurodegenerative disorders, epilepsy, and brain tumor delineation, where the combined anatomical‑functional imaging improves diagnostic confidence. The remaining 10 % is allocated to infection and inflammation applications, including prosthetic joint infection detection and vasculitis evaluation, where PET/CT offers superior specificity over conventional imaging. These sub‑segments collectively shape the overall market size, with each proportion reflecting clinical adoption rates, reimbursement environments, and the availability of indication‑specific radiopharmaceuticals.