In hospitals with a Nuclear Medicine department, the Cyclotron room is always the area demanding the strictest air control standards. This is where radioisotopes are produced for PET imaging — a process that is essential for diagnosis, but also carries a risk of radiation exposure if the air filtration system is inadequate. BIBO (Bag In – Bag Out) filter housings, paired with specialized radioactive filters, offer hospitals a safe, effective, and durable solution to this challenge.

Why Does the Cyclotron Area Need a Special Filtration System?

Operating a Cyclotron and producing radiopharmaceuticals comes with strict requirements: controlling airborne radioactive contaminants, preventing their release into the environment, maintaining proper airflow direction between clean and contaminated zones, and protecting the safety of operating and maintenance staff.

The most critical challenge is filter replacement. With conventional filtration systems, staff must open the housing to remove a contaminated filter — exposing them directly to a radioactive filter element and risking the release of contaminants into the surrounding environment. This is exactly why hospitals with Nuclear Medicine departments need a more specialized filtration solution.

What Is a BIBO Filter Housing?

BIBO (Bag In – Bag Out) is a safety filter housing system that lets staff seal a used filter into a dedicated isolation bag as it is being removed from the housing, before it is taken out of the area. This means the operator never comes into direct contact with a potentially radioactive filter surface, and contaminants have no opportunity to escape into the surrounding air during replacement.

Compared with conventional filter housings, BIBO housings represent a significantly higher safety standard, making them especially suited to areas with a risk of radioactive, hazardous chemical, or biological contamination — such as laboratories, isolation areas, pharmaceutical cleanrooms, and hospital Cyclotron rooms.

Anatomy of a 4-Stage Radioactive Air Filtration System

A complete radioactive exhaust filtration system for a Cyclotron area is typically designed with multiple filtration stages, treating contaminants sequentially from coarse particles down to gas/molecular level:

• F8 pre-filtration removes larger dust and aerosol particles, protecting the downstream stages and extending the life of the whole system.
• HEPA filtration controls ultrafine particles and aerosols in the 0.1–0.3 micron range, including particulate contaminants that may carry radioactivity.
• A specialized activated-carbon radioactive filter adsorbs gaseous and molecular contaminants, with the carbon type selected to match the specific exhaust characteristics.
• The BIBO housing provides an isolated filter chamber with a dedicated bag system, ensuring complete safety during leak testing, filter removal, and replacement.

This multi-stage design allows the system to comprehensively treat different types of contaminants while ensuring long-term operational safety for sensitive areas like the Cyclotron room.

Real-World Case Study: Cho Ray Hospital

Cho Ray Hospital (Ho Chi Minh City), founded in 1900, is one of Vietnam’s largest and most respected medical centers, renowned for surgery, oncology, cardiology, and infectious disease treatment. In the hospital’s PET-CT and Cyclotron area, the challenge was to find a filtration system that could handle radioactive exhaust while guaranteeing complete safety for staff during filter replacement and preventing any release of contaminants into the environment.

Air Filtech consulted on and implemented a BIBO safety filter housing solution combined with the 4-stage radioactive filtration system described above (F8 – HEPA – radioactive filter – BIBO housing). The system has since been installed and is now in operation in the Cyclotron room at Cho Ray Hospital, fully meeting the radiation safety control requirements of the Nuclear Medicine department.

Benefits of BIBO Filter Housings in Hospitals

Installing BIBO filter housings and radioactive filters delivers several practical benefits for hospitals with Nuclear Medicine departments: it protects technical and maintenance staff by eliminating direct contact with contaminated filters; it prevents contaminants from escaping into the surrounding environment during filter replacement; it maintains proper airflow direction and clean/contaminated zone control in line with Nuclear Medicine standards; and it meets the increasingly strict radiation safety requirements at hospitals and imaging diagnostic centers.

Why Choose Air Filtech

With experience consulting on and implementing specialized filtration solutions for sensitive areas such as Cyclotron rooms, cleanrooms, and isolation zones, Air Filtech delivers custom-designed solutions tailored to each hospital’s actual operating requirements — from site survey and system consultation to installation and post-handover technical support.

If your hospital or medical facility is looking for a safe radioactive exhaust control solution for a Cyclotron or Nuclear Medicine area, contact Air Filtech for advice on the right BIBO filter housing solution.

Air Filtech – Clean Air Solutions

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