As of: 01.09.2026
Is your protective equipment suited to today’s activity, and what gap in protection remains despite the apron?
Review your equipment in the same sequence as the procedure: fit and condition, protection for the neck and eyes, then additional shielding at the workplace. The apron is part of the protection concept, not a substitute for it.
Lead apron, thyroid protection and lead glasses: what the equipment really provides, where its limits lie and why it is the last rather than the first protective measure.
Personal protective equipment (PPE) is the most visible element of radiation protection, but not the most important. It is the last layer, after time, distance and structural or mobile shielding. It does not replace these measures; it complements them. Those who understand this make better decisions in daily practice than those who rely solely on an apron.
The lead apron
X-ray protective aprons are characterised by their lead equivalence , meaning the thickness of lead that would produce the same attenuation (common values are around 0,25 to 0,5 mm of lead). In the diagnostic energy range, they substantially attenuate scattered radiation. In practice, what matters is the correct size and fit, wrap-around aprons for procedures involving a lot of movement, weight (back strain during long procedures) and regular checks for tears. A folded or torn apron loses its protective effect precisely at the damaged spot, without this being visible from the outside.
Thyroid protection and lead glasses
The thyroid shield covers a radiosensitive organ located above the apron. The lead glasses protect the eye lens and have become more important since the eye-lens dose limit was lowered internationally (more under Eye-lens dosimetry (DE)). Both close gaps in protection that the apron leaves open.
What PPE cannot do
PPE only protects against scattered radiation, and only where it provides coverage. It does not protect against the direct primary beam. Hands and head usually remain unprotected, and this is precisely where correct positioning and ceiling-mounted or mobile protective shields help more than a second layer of apron material. PPE is therefore not a licence to move closer to the radiation.
Remember: Distance remains the most effective measure, and an apron is no substitute for taking a step back. PPE complements time, distance and shielding; it never replaces them.
BAG guidance documents for further reading: Requirements for personal protective equipment as well as Information on protective equipment for users. All guidance documents: BAG overview of radiation protection guidance documents.
Frequently asked questions
Does the lead apron also protect the eyes?
No. The eye lens and thyroid are outside the area covered by the apron; lead glasses and, where needed, a thyroid shield are required, supplemented by distance and protective screens.
What matters when choosing an X-ray protective apron?
Adequate lead equivalence, good fit and consistent care. Exact requirements depend on the activity and workplace rules.
How often must an apron be inspected?
Regularly, for tears and material fatigue, because invisible damage can eliminate protection. Inspections are documented; the interval depends on use and workplace requirements.
Related course
Occupational radiation exposure
Explore this topic in greater depth in this course.
2 UE · CHF 38
After completing the course, you will receive confirmation of participation showing the teaching units completed.