Lead Shielding Calculator for X-Ray Room Doors
Get an indicative lead-thickness band (mm Pb) for an X-ray, CT, fluoroscopy, dental or cath-lab room door from the modality, tube kVp, weekly workload, distance and occupancy. A screening estimate only — not an AERB design.
This is a rough screening estimate, not a shielding design. The legal radiation-barrier calculation (instantaneous and time-averaged dose limits, primary vs scatter geometry, broad-beam transmission curves, floor/ceiling/frame and threshold detail) must be done by a qualified Radiological Safety Officer (RSO) / medical physicist and approved by AERB before construction. Never order a lead door from this number alone.
Room & source
Standard chest/limb X-ray room — ~1.5–2 mm Pb is a common indicative band. Offices, reception desks, wards, control rooms — staffed full time. Behind the door is the public — tighter dose limit, so more lead. Higher kVp, higher workload and higher occupancy push the lead up; greater distance to the door (inverse-square) pulls it down. Reference distance 3 m. Indicative India 2026 screening model only.
Indicative lead thickness for the door
0.0 mm Pb
Estimated band 1.9–2.9 mm Pb · Heavy shielding
Recommended
2.4 mm
Low end
1.9 mm
−25%
High end
2.9 mm
+25%
Lead vs distance to the door
Dashed line ≈ your distance. Indicative only — confirm with an RSO.
How modalities compare
Each modality at its typical kVp and workload, with your current distance, occupancy and area type. Your selected modality is highlighted. General radiography lands ~1.5–2 mm Pb and CT ~2–3 mm Pb in typical layouts.
Prepare for the RSO & AERB review
DesignAI helps you assemble what the Radiological Safety Officer will ask for — geometry, dose targets, frame and threshold shielding — and what a lead door realistically costs and takes to deliver.
How this estimate works. It starts from a typical lead thickness for the chosen modality and gently scales it up for higher tube kVp (more penetrating radiation), higher weekly workload (mA-min/week, scaled logarithmically like half-value-layer behaviour), higher occupancy behind the door, and public (uncontrolled) areas — and scales it down for greater distance (inverse-square). The result is a coarse band, not a transmission-curve solution.
Why it is not enough. A real barrier design uses NCRP 147 / AERB methodology with the actual room geometry, primary-beam vs scatter and leakage contributions, the design dose limits for each adjoining area, and broad-beam lead transmission data — plus the floor, ceiling, frame, hinge side, vision panel and threshold, which often govern. These doors are project-engineered: get a vendor spec and an RSO sign-off.
Cost & GST. Lead/radiation-shielded door sets in India run roughly ₹40,000–₹2,00,000+ supply-only depending on lead equivalence, size, frame and vision panel, before 18% GST. Treat any figure here as indicative and confirm a written vendor quotation.
Related Guides — Deep-dive reading
Radiation-Shielded Doors in India: Lead-Lined Guide 2026
How lead thickness, AERB approval and vision panels are engineered for X-ray, CT, cath-lab and radiotherapy doors.
Home Doors & EntrancesAERB Compliance for Radiology & Imaging Rooms: Architect's Working Reference
Atomic Energy Regulatory Board Codes for Diagnostic Radiology, Mammography, CT, Cathlab, MRI, Nuclear Medicine, and Radiotherapy — Barrier Calculation Principles, Lead-Equivalent Specification, Door & Viewing Window Design, RSO Appointment, Layout Approval Process, and Per-Room Architectural Detail
Healthcare ArchitectureX-Ray Room Lead Doors: AERB Specs & Cost (India 2026)
How to specify lead-lined doors for diagnostic X-ray and CT rooms in India — Pb thickness, AERB sign-off, lead glass windows, interlocks and cost.
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