[A new biological irradiator for the laboratory]

Area of Science:

• Medical Physics
• Radiation Biology
• Biotechnology

Context:

• High-dose irradiation (15-20 Gy) of blood products is crucial for preventing graft-versus-host disease (GVHD) in immunocompromised patients.
• Current methods often utilize cesium-137 (137Cs) gamma sources, posing safety and disposal challenges.
• Existing irradiators require no structural shielding but carry risks of accidents and long-term radioactive waste management issues.

Purpose:

• To introduce and characterize a novel self-shielded X-ray irradiator system for blood-derived materials.
• To evaluate the environmental and dosimetric properties of the X-ray beam for suitability in blood irradiation.
• To provide a safer and more manageable alternative to traditional radioactive sources for blood irradiation.

Summary:

• A new self-shielded irradiator utilizing a 200-kV X-ray tube was designed as an alternative to radioactive sources for blood irradiation.
• Environmental and dosimetric measurements confirmed the system's capability to produce beams with satisfactory characteristics for this application.
• The X-ray system is water- and oil-cooled, allowing for prolonged operation without thermal overload and reducing radioprotection complexities.

Impact:

• The developed X-ray irradiator system offers a safer alternative to radioactive sources, mitigating risks associated with accidents and waste disposal.
• Implementation of this system can significantly reduce administrative radioprotection burdens.
• This technology has the potential to enhance safety and efficiency in blood product irradiation for clinical applications.