ArticleQuantitative imaging in medicine and surgery2025
Effect of different scanning threshold triggers on the image quality of brain computed tomography angiography: a randomized controlled trial.
Article in Quantitative imaging in medicine and surgery, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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Who cites it
4 citing papers in PubMed.
- Optimization of the Sequence of Computed Tomography Angiography and Perfusion in One-Stop-Shop CT Imaging for Acute Ischemic Stroke.Medical science monitor : international medical journal of experimental and clinical research · 2026Article
- Efficiency and Optimization of Iodinated Contrast Agents in Cerebral Aneurysm CT Angiography: A Systematic Review.Diagnostics (Basel, Switzerland) · 2026Review
- Accuracy of Distal Internal Carotid Artery Contrast Ratio to Infer Proximal Carotid Disease in the Mobile Stroke Unit.Stroke (Hoboken, N.J.) · 2026Article
- Optimization of Bolus-Tracking Thresholds levels in Cerebral CT Angiography: Influence of Patient Characteristics on contrast enhancement dynamics and radiation dose metrics.F1000Research · 2025Article
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Authors and funding
8 authors.
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Abstract
Background: The scanning trigger threshold affects image quality. The aim of this study was to investigate the effect of different scanning trigger thresholds on brain computed tomography angiography (CTA) image quality. Methods: In this prospective study, 80 patients undergoing brain CTA examinations with dual-layer CT (DLCT) were randomly divided into group A and group B, with 40 patients in each group. In group A, the CT value of the internal carotid artery at the level of the fourth cervical vertebra was monitored, and the scan was initiated once the CT value reached 100 Hounsfield units (HU). In group B, the trigger threshold was set at 60 HU, with all other parameters kept consistent with those of group A. Finally, the image quality of the 50-keV virtual monoenergetic images (VMIs) was evaluated, including the CT values of the internal carotid artery (CT Results: All images met the diagnostic imaging requirements. Group B showed significantly lower values than did group A for CT Conclusions: For brain CTA imaging in DLCT (50 keV VMIs), lowering the scan trigger threshold to 60 HU helped to reduce venous artifacts and improve image quality (as evidenced by improved subjective scores) and also suggests the potential for a further reduction of the contrast dose.
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