The Type segmentation of the Quantitative Brain Function Imaging Device market distinguishes four primary technology families: functional MRI‑based devices, near‑infrared spectroscopy (NIRS) systems, PET‑derived quantitative scanners, and EEG‑based quantitative platforms. Functional MRI devices dominate due to their high spatial resolution and ability to map hemodynamic responses, accounting for roughly 38% of market revenue. NIRS systems, valued for portability and cost‑effectiveness in bedside monitoring, contribute about 22%, expanding adoption in intensive care and intra‑operative settings. PET‑derived quantitative scanners, though limited by radiotracer logistics, capture a premium niche of 18% owing to their metabolic specificity for research and oncology applications. EEG‑based quantitative platforms, leveraging advanced signal processing to derive functional metrics, hold 22% of the market, driven by growth in neurofeedback and sleep‑disorder diagnostics. Collectively, these technology types shape the overall market size, with each sub‑segment reflecting distinct cost structures, regulatory pathways, and end‑user preferences, providing a comprehensive view of the Quantitative Brain Function Imaging Device segmentation.