The Types segment classifies MRI flowmeters by underlying measurement principle, namely Ultrasonic, Electromagnetic, and Thermal technologies. Ultrasonic flowmeters, which dominate with an estimated 55% share, employ Doppler‑based sound waves to calculate velocity profiles, offering high accuracy without direct contact and thus fitting most clinical environments. Electromagnetic flowmeters, contributing roughly 30% of the market, rely on Faraday’s law to detect conductive fluid movement; they are favored in research settings where fluid conductivity varies and non‑invasive probes are less critical. Thermal flowmeters, comprising the remaining 15%, measure heat transfer between a heated element and the flowing medium, providing cost‑effective solutions for low‑flow-rate applications such as cerebral perfusion studies. Each type aligns with specific performance requirements and cost structures, influencing procurement decisions and ultimately shaping the overall market taxonomy for MRI flow measurement devices.