Reference · Secure facilities & shielding
Lead shielding
Lead shielding (radiation)
Lead shielding uses lead's high density to attenuate X-rays and gamma radiation. In medical, dental, and industrial rooms it is installed as lead-lined drywall, doors, glass, and barriers, sized from the radiation source and lead's half-value layer.
What it is
Lead applied as sheet, lined gypsum board, leaded glass, door cores, and shielded frames to reduce ionizing-radiation exposure. It is the most common material for diagnostic-energy X-ray and gamma shielding because it is dense and workable.
Why it exists
Facilities that generate ionizing radiation must protect adjacent occupied spaces to meet regulatory dose limits; lead delivers high attenuation in a comparatively thin barrier.
Who it applies to
Contractors fitting out imaging suites, dental offices, cath labs, and industrial radiography rooms, working to a qualified physicist's shielding design.
Frequently asked
Why is lead used for radiation shielding?
Lead is used because its high density and atomic number make it very effective at absorbing X-rays and gamma rays in a relatively thin, workable barrier. That efficiency is why imaging and radiation-therapy rooms are typically lead-lined.
Related terms
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