The Radiation Shielding Door segmentation by application distinguishes four primary end‑use groups that collectively define market dynamics. Medical imaging facilities—including hospitals, diagnostic centers, and oncology suites—represent the largest share, accounting for roughly 35% of total revenue, driven by high installation volumes for linear accelerators and CT scanners. Nuclear power plants follow with an estimated 30% contribution, reflecting stringent regulatory requirements for containment doors in reactor bays and spent‑fuel handling areas. Research laboratories—such as particle‑physics institutes and material‑testing centers—contribute about 20%, where custom‑engineered doors accommodate variable radiation spectra and frequent reconfiguration. Finally, industrial radiography applications, encompassing non‑destructive testing and oil‑field logging, hold the remaining 15%, supported by portable shielding solutions for field operations. Each segment’s proportional weight influences supply chain planning, pricing strategies, and technology investment, thereby shaping the overall size and growth trajectory of the Radiation Shielding Door market.