Segmentation by type classifies IVD systems into Passive and Active detector families, each with multiple sub‑technologies that shape adoption patterns. Passive detectors—including thermoluminescent dosimeters (TLDs), optically stimulated luminescent dosimeters (OSLDs), diodes, and MOSFETs—are valued for their low cost and ease of integration, contributing roughly 45% of unit shipments, especially in resource‑constrained clinics. Active detectors, such as real‑time electronic portal imaging devices (EPIDs), scintillation fiber arrays, and ionization chamber‑based probes, deliver instantaneous dose read‑outs, supporting advanced techniques like adaptive radiotherapy; they capture about 55% of market value despite higher capital expense. Within passive devices, diodes dominate due to rapid response, while MOSFETs are favored for high‑gradient measurements. Among active solutions, EPIDs lead in external beam settings, whereas scintillation fibers are emerging in proton and brachytherapy contexts. This type‑based taxonomy clarifies investment flows and informs strategic positioning for vendors.