In plain language
After two congenital interventional cardiologists in one UK lab developed brain and cervical spine tumors, a new X-ray system was found to have cut patient dose by about 30%. Operator dose was not measured, and the tumor link remains unproven.
At a glance
- Type of study
- Original research, Retrospective cohort study
- Who was studied
- Interventional cardiologists, Patients
- Size
- n = 9,002 patients
- Where
- United Kingdom
- Topics
- Brain tumorsCancer riskPatient doseDose reduction techniquesDosimetry and monitoringPersonal protective equipmentRegulation and policy
- Summary based on
- the full text
What it found
Total patient exposure dose fell by about 30% after replacement of the old catheter lab with new equipment, during the period both operators worked together.
Key figures: 30.2% reduction; Lab 1 2073.1 vs Lab 2 1446.3 cGy/cm2; p 2.4 -13
Most of the dose reduction came from lower acquisition dose; fluoroscopy dose fell modestly despite longer fluoroscopy time.
Key figures: Acquisition dose 887.7 vs 379.2 cGy/cm2 (57.3%, p < 0.025); fluoro dose 1221.5 vs 1079.8 cGy/cm2 (11.6%, p < 0.025)
Dose rose steadily as the old lab aged, without change in procedure time; in its last 3 years compared with the new lab, dose was 38% higher.
Key figures: 38% (2280 to 1408 cGy/cm2)
Two congenital interventional cardiologists in the same lab developed CNS tumors (left frontal and high cervical) within 10 months, in body areas not covered by lead.
Operator dosimeters were worn under lead at the right hip, giving no information on head or neck dose.
Limits to keep in mind
Single-centre before-after comparison using patient dose data only, with no operator dosimetry; case mix and practice changed over time and the tumor cases are an anecdotal pair, so causation cannot be established.
Related research summaries
- Radiation protection practices in diagnostic and interventional cardiology: Position paper from Portuguese Association of Interventional Cardiology (2025, Guideline or consensus statement)
- Radiation Safety in Chronic Total Occlusion Percutaneous Coronary Intervention (2025, Narrative review)
- Radiation Exposure, Training, and Safety in Cardiology (2024, Narrative review)
- IU Health Handbook of Fluoroscopy Safety (Guideline or consensus statement)
- Radiation exposure in interventional cardiology: a narrative review of health effects and novel approaches to ensure radiation safety (2025, Narrative review)
How this summary was made
ORSIF prepared this summary with AI assistance from the full text of the paper. A program then checked that the passage supporting each finding appears word for word in that source. A person has not yet reviewed each summary, so read the original before relying on a number. ORSIF summarizes research and does not endorse any product or company. Report a problem with this summary.
Prepared November 3, 2026.