Reference Levels for Diagnostic and Interventional X-ray Exposures in Germany: Development, Handling, and Perspective

At a glance

Type of study

Narrative review

Who was studied

Patients

Where

Germany

Topics

Patient doseRegulation and policyDose reduction techniquesDosimetry and monitoring

Summary based on

the abstract

What it found

• Many German diagnostic reference levels were more than halved over nearly 20 years.

  Key figures: more than halved in nearly 20 years

• Diagnostic reference levels (DRLs) fell through continuous protocol optimization and more advanced hardware and software.

• The DRL catalogue was expanded considerably, while some DRLs were removed for exposures no longer routinely indicated.

• Diagnostic and interventional X-ray applications account for most man-made radiation exposure in Germany.

  Key figures: over 95%

• Dose management systems facilitate implementation, and national DRLs should be complemented by facility-specific local DRLs.

Limits to keep in mind

Narrative review of national regulation and DRL development, assessed from the abstract only; it addresses patient dose, not occupational dose, and gives no specific quantitative values for interventional procedures.

Related research summaries

• Radiation Safety in Chronic Total Occlusion Percutaneous Coronary Intervention (2025, Narrative review)
• Radiation Protection in Interventional Radiology (2022, Narrative review)
• Radiation-Induced Noncancer Risks in Interventional Cardiology: Optimisation of Procedures and Staff and Patient Dose Reduction (2013, Narrative review)
• Two Central Nervous System Tumors in One Catheter Lab: Time to Rethink Radiation Protection (2026, Retrospective cohort study)
• Radiation protection practices in diagnostic and interventional cardiology: Position paper from Portuguese Association of Interventional Cardiology (2025, Guideline or consensus statement)