In plain language
This narrative review finds many lead-free and composite shielding materials can match lead attenuation at lower weight in laboratory and simulation studies, but performance varies with energy and test geometry, and some materials protect less than lead.
At a glance
- Type of study
- Narrative review
- Summary based on
- the full text
What it found
In broad-beam geometry, tin and tin/bismuth shields performed worse than lead, increasing effective dose depending on tube voltage.
Key figures: effective dose increased by 60%, 6%, and 38% for tin; 14%, 3%, and 35% for tin/bismuth at 60, 75, 120 kVp
Commercial lead-free garments EarthSafe and Xenolite met 0.5 mm lead equivalence at 80 and 100 kVp but not above 100 kVp; Demron shielded at higher energies.
Key figures: 0.5 mm lead equivalency at 80 and 100 kVp
A tin-tungsten lead-free shield attenuated 60-120 kVp X-rays similarly to lead while being lighter.
Key figures: 20% lighter
A bismuth titanate epoxy shield equivalent to 0.35 mm Pb attenuated up to 97% of X-rays at half the weight of lead.
Key figures: up to 97% attenuation at 80 and 100 kVp
Most studies reporting lead-free shield performance used narrow-beam geometry, which ignores secondary radiation generated in the shield.
Limits to keep in mind
Narrative review without systematic search or quality appraisal; most cited evidence is laboratory, phantom or Monte Carlo data, often in narrow-beam geometry, with little measurement on working staff.
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How this summary was made
ORSIF prepared this summary with AI assistance from the full text of the paper. A program then checked that the passage supporting each finding appears word for word in that source. A person has not yet reviewed each summary, so read the original before relying on a number. ORSIF summarizes research and does not endorse any product or company. Report a problem with this summary.
Prepared November 3, 2026.