Achieving lower radiation dose of cerebral computed tomography angiography: The role of high-concentration contrast medium.
Eur J RadiolMay 17, 2026 (epub)
Clinical ResearchRadiology (Diagnostic)
Wei Zheng, Suying Wu, Baoteng Zhang et al.
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In 30 seconds
This randomized controlled trial evaluated the impact of high-concentration iodine contrast medium (HICM) on radiation dose in cerebral computed tomography angiography (CTA) among 150 patients. The study found that using iomeprol 400 with a low-dose protocol resulted in a 46% reduction in radiation dose compared to standard protocols, while maintaining image quality.
Key findings
- Group A and C achieved a 46.53% and 45.62% reduction in radiation dose compared to Group B.
- No significant differences in Signal-to-Noise Ratio (SNR) and Contrast-to-Noise Ratio (CNR) were observed among the groups.
- Higher iodine concentration allowed for a lower injection flow rate while achieving target iodine delivery rates.
Why it matters
Reducing radiation exposure during imaging procedures is crucial for patient safety. This study suggests that using high-concentration contrast media can effectively lower radiation doses in CTA without compromising diagnostic quality, which is important for clinical practice.