In plain language
In a Swedish neurointensive care unit, a mobile head computed tomography (CT) with built-in lead shielding cut scatter by 91-99% in phantom measurements, and nurse and clinician doses were tiny per scan. This is a dosimetry result, not a health outcome, in a CT rather than fluoroscopy setting.
At a glance
- Type of study
- Original research, Dosimetry measurement study
- Who was studied
- Nurses, Other physicians, Phantom or simulation (no people)
- Size
- n = 31 adult patient examinations
- Where
- Sweden
- Topics
- Room shielding and protective devicesDosimetry and monitoringPersonal protective equipmentEye lens and cataractsTraining and education
- Summary based on
- the full text
What it found
Integrated lead curtain and rear shield on the mobile head CT reduced scatter radiation by 91-99% in all positions except behind the operator console, where gantry shielding already kept doses low.
Key figures: 91% to 99% reduction (P < 10^-7); 64% at console position
Average personal chest dose per examination was very low for the operating radiology nurse and the attending clinician.
Key figures: 0.07 ± 0.03 µSv (nurse); 0.03 ± 0.02 µSv (clinician); n=31 examinations
Over 3 months, no area or eye lens dosimeter exceeded its minimum detectable level.
Key figures: <0.05 mSv ambient; <0.1 mSv eye lens
The highest personal dose occurred the only time staff did not use the integrated shielding.
Key figures: approximately 1 µSv
Projected cumulative dose: more than 1000 shielded examinations to reach 0.1 mSv, versus about 100 without shielding.
Key figures: >1000 vs ~100 examinations to reach 0.1 mSv
Limits to keep in mind
Single-centre study with low workload (fewer than 3-4 exams weekly), so passive dosimeters stayed below detection limits; scatter measured with a phantom, and only 31 exams with active dosimetry, mostly with clinicians leaving the room.
Related research summaries
- SCAI Multi-Society Position Statement on Occupational Health Hazards (2020, Guideline or consensus statement)
- Occupational Radiological Protection in Interventional Procedures, ICRP PUBLICATION 139 (2018, Guideline or consensus statement)
- ICRP Draft - Radiological Protection in Fluoroscopically Guided Procedures (Guideline or consensus statement)
- Occupational Protection in Interventional Radiology. A Joint Guideline of the Cardiovascular and Interventional Radiological Society of Europe and the Society of Interventional Radiology (2026, Guideline or consensus statement)
- Occupational Health Hazards in the Cardiac Catheterization Laboratory: Results of the 2023 SCAI Survey (2025, Cross-sectional survey)
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.