Radiation Protection Needs in Interventional Radiology Rooms

Interventional radiology (IR) delivers life-saving, minimally invasive treatments, but it also creates one of the highest radiation environments in a hospital. To protect staff and patients, IR rooms must combine properly designed structural shielding with well-chosen personal protective equipment and smart workflow practices.

Why Interventional Radiology Needs Special Protection

IR procedures often use long fluoroscopy times, high frame rates, and oblique C-arm angles, which significantly increase scatter radiation around the table. Unlike routine radiography, the physician and scrub nurse stand close to the X-ray source for extended periods, so even relatively low dose rates can accumulate to substantial annual doses. In a busy IR lab, lens doses near the new threshold for radiation-induced cataracts can be reached within a few years without effective shielding and PPE.

Because of this, IR room design must address three classic protection principles—time, distance, and shielding—at both the room and personal level.

Structural Shielding Requirements for IR Rooms

Design basis and standards

Radiation shielding design for IR rooms is typically based on workload, use factors, occupancy factors, and distance, following international guidance such as NCRP 147/148 or equivalent national codes. These calculations determine the required lead equivalence for walls, doors, floor, and ceiling so that dose limits for staff, adjacent workers, and the public are not exceeded.

In practice, the shield designer evaluates the maximum fluoroscopy workload, typical tube voltages (often 70–120 kV in IR), and the layout of adjacent rooms and corridors. Areas with full-time occupancy (offices, control rooms) require more conservative design than storage or technical spaces.

Walls, floor, ceiling, and doors

IR rooms usually require:

• Primary and secondary barrier walls with sufficient lead or lead-equivalent material to attenuate the direct beam and scatter radiation to acceptable levels.

• Shielding height that typically extends to at least 2.1 m–2.4 m above the floor, to cover staff standing positions and scattered radiation fields.

• Evaluation of floor and ceiling shielding when there are occupied spaces above or below the IR suite, especially if high-workload fluoroscopy is expected.

• Shielded doors with integral lead sheets and tight overlap with the wall shielding, preventing radiation "leaks" around the entrance.

Lead glass observation windows allow the operator in the control room to maintain visual contact while staying behind a protective barrier. These windows use high-density lead glass with a defined lead equivalence (for example, 1.8–2.1 mmPb) and must be integrated so that their overall shielding matches the surrounding wall.

Ceiling-Suspended and Table-Side Shields

Even with good structural shielding, staff are exposed to substantial scatter radiation around the patient table. Local protective devices placed close to the source and patient can dramatically reduce this exposure.

Ceiling-suspended shields

Ceiling-mounted, transparent lead acrylic shields positioned between the patient and the operator's head and torso can lower operator eye and head dose by 60–90% or more when correctly used. These shields are most effective when brought as close as possible to the patient and angled to intercept scatter traveling toward the operator's face and upper body.

For Longyue Medical, ceiling-suspended lead screens and mobile leaded shields can be configured with different sizes and lead equivalences to match the geometry of your IR suite and procedure mix. When combined with Longyue's lead glass windows, they create a continuous shielding system from the table to the control area.

Table-side curtains and under-table shielding

The lower body (pelvis and legs) of the operator often receives the highest exposure during fluoroscopic procedures, because scatter emerges strongly from under the patient and table. Lead-rubber curtains mounted on the table side and under-table shielding panels can reduce staff dose at pelvic and leg level by over 90% in many IR scenarios.

Clinical studies in cardiac and spine interventions show that combining under-table shields with table-side lead drapes markedly reduces torso and pelvic dose to physicians and scrub nurses. Longyue's X-ray protective lead curtains and screens are designed for this purpose, providing flexible side and front shielding that integrates with existing tables or C-arm systems.

Essential Personal Protective Equipment (PPE) in IR

Even the best room shielding cannot replace proper PPE worn by each staff member. For interventional radiologists, nurses, anesthesiologists, and technicians working in IR rooms, the core PPE set includes:

• Lead or lead-equivalent aprons with appropriate lead equivalence (often 0.35–0.5 mmPb at the front).

• Thyroid collars to protect the highly radiosensitive thyroid gland.

• Lead glasses or goggles to reduce lens dose and prevent radiation-induced cataracts.

• Additional items where needed, such as lead caps, protective gloves, and gonad shields for specific tasks or positions.

Longyue Medical supplies a full portfolio of IR-ready PPE, including single-front, wrap-around, and vest-skirt apron designs, as well as super-soft and lead-free series that help reduce musculoskeletal strain during long procedures. All protective clothing is manufactured to meet national and international test standards for X-ray protective equipment, and each piece is tested for lead equivalence and integrity before leaving the factory.

Workflow and Positioning: Using the Room Safely

Room design and PPE must be supported by good working habits to maintain radiation exposure As Low As Reasonably Achievable (ALARA). Key practices include:

1. Minimizing fluoroscopy time and using the lowest frame rate compatible with image quality.

2. Positioning staff on the image-intensifier or detector side of the C-arm when possible, since scatter is lower there than on the tube side.

3. Standing as far from the X-ray tube and patient as is practical, using extension tubing and remote controls when available.

4. Ensuring ceiling-suspended shields and table-side curtains are correctly positioned before fluoroscopy starts, and adjusting them whenever C-arm angulation changes.

5. Wearing personal dosimeters consistently and reviewing dose reports regularly to identify opportunities for further optimization.

Longyue's application support team can help hospitals and IR centers choose suitable shields and PPE, then integrate them into existing workflows to improve both safety and efficiency.

How Longyue Medical Supports IR Radiation Protection

Longyue Medical focuses on the R&D and production of X-ray protective clothing, patient protection products, protective masks, glasses, and screens, with all products tested by authorized radiation protection quality testing centers. Our portfolio for interventional radiology rooms includes:

• X-ray protective lead aprons, thyroid collars, caps, goggles, gloves, and gonad shields for staff and patients.

• X-ray protective lead screens and curtains, suitable for use as mobile shields, ceiling-track curtains, or table-side drapes in IR labs.

• Structural shielding components such as lead glass windows that integrate into IR control rooms and observation areas.

By combining professionally designed room shielding with Longyue's certified PPE and shielding accessories, hospitals can create a safer environment for interventional teams while maintaining high procedural efficiency.

For customized radiation protection solutions for your interventional radiology rooms, you can contact Longyue Medical at lyylqx@126.com or visit www.longyuemedical.com.