X-Ray radiation and the lead shielding mechanism
X-Ray machines operate by generating ionizing radiation. When passing through living tissue, these rays can ionize atoms and damage cell structures. The high density and high atomic number of lead (Z=82) effectively block and absorb the vast majority of scattered X-Rays.
In diagnostic rooms, lead aprons are the primary line of defense for physicians, technicians, and patient relatives who must stay in the room during exposures.
The ALARA principle and lead aprons
The **ALARA** (As Low As Reasonably Achievable) principle states that radiation exposure should always be kept to the lowest practical level. Lead apron use is a core part of this approach, based on several key rules:
- All personnel remaining in the room must wear their aprons and secure velcro straps before the machine is activated.
- Depending on the procedure (e.g. interventional work), aprons should be paired with thyroid collars and lead glasses.
- Patients' reproductive organs outside the target zone should be covered with gonad shields.
- The appropriate lead equivalency (0.25 mm Pb, 0.35 mm Pb, or 0.50 mm Pb) must be selected based on dose levels.
Apron usage by machine type
During mobile (portable) X-Ray scans, the operator should stand at least 2 meters away from the source and wear a lead apron. In stationary X-Ray rooms without protective control windows, or in high-dose environments like angiographies and fluoroscopies, full-wrap or vest-skirt style aprons are mandatory.
Oley Medical Products offers a wide range of CE-certified lead aprons compliant with IEC 61331 standards, tailored to various clinical environments.