Implementation of DRLs in the UK.

Area of Science:

• Medical Physics
• Radiology
• Radiation Protection

Background:

• The EC Medical Exposure Directive mandates the promotion of diagnostic reference levels (DRLs) in all Member States.
• The UK has developed a regulatory system and practical guidance for implementing DRLs for medical X-ray examinations.
• Patient dose databases are crucial for establishing national DRLs and ensuring radiation safety.

Purpose of the Study:

• To describe the UK's system for implementing diagnostic reference levels (DRLs) for medical X-ray procedures.
• To highlight the role of national patient dose databases in setting and reviewing DRLs.
• To discuss progress in adopting DRLs and providing guidance for their local application.

Main Methods:

• Utilizing two national patient dose databases maintained by the National Radiological Protection Board (NRPB).
• Analyzing data from radiographic, fluoroscopic, and computed tomography (CT) examinations.
• Reviewing recommended national reference doses and initial CT database findings.

Main Results:

• Discussion of recommended national reference doses for radiographic and fluoroscopic examinations.
• Computed tomography (CT) examinations represent a significant portion (50%) of the UK's collective dose from medical X-rays.
• Initial analysis of the CT database shows promising indications of reduced patient doses in some examinations.

Conclusions:

• The UK's regulatory framework and guidance support the establishment and use of DRLs.
• National patient dose databases are essential tools for radiation protection in medical imaging.
• Ongoing efforts aim to formally adopt DRLs and facilitate their practical implementation.