ArticleClinical neuroradiology2023
Collateral Capacity Assessment : Robustness and Interobserver Agreement of Two Grading Scales and Agreement with Quantitative Scoring.
Article in Clinical neuroradiology, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.
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Who cites it
8 citing papers in PubMed.
- [Factors influencing hemorrhagic transformation after mechanical thrombectomy in patients with acute ischemic stroke patients].Zhong nan da xue xue bao. Yi xue ban = Journal of Central South University. Medical sciences · 2026Observational
- Automated collateral assessment restricted to the hypoperfused area for distal vessel occlusions in ischemic stroke.European radiology · 2025Article
- Quantitative insights into stroke recovery utilizing delayed vessel ratio from color-coded multiphase computed tomography angiography.Frontiers in neurology · 2025Article
- Automatic collateral quantification in acute ischemic stroke using UFrontiers in neurology · 2025Article
- Effect of collateral circulation in patients with multiple craniocervical artery stenoses.Clinical and translational science · 2023Article
- Inter-Rater Reliability of Collateral Status Assessment Based on CT Angiography: A Retrospective Study of Middle Cerebral Artery Ischaemic Stroke.Journal of clinical medicine · 2023Article
- Pivotal role of multiphase computed tomography angiography for collateral assessment in patients with acute ischemic stroke.La Radiologia medica · 2023Review
- Automated Collateral Scoring on CT Angiography of Patients with Acute Ischemic Stroke Using Hybrid CNN and Transformer Network.Biomedicines · 2023Article
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10 authors.
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Abstract
background and purposeIntracranial collateral capacity is conducive to imply parenchymal perfusion of affected territory after acute vessel occlusion. The Tan collateral score is commonly used to assess the intracranial collateral capacity; however, this score is coarsely grained and interobserver agreement is low, which reduces prognostic value and clinical utility. We introduce and evaluate an alternative extended Tan score based on the conventional Tan scale and assess the agreement with a quantitative score.
methodsWe included 100 consecutive patients with a proven acute single large vessel occlusion of the proximal anterior circulation. Collaterals were graded with the conventional and extended Tan score and an automated quantitative score. The extended Tan score is a finer 6‑scale manual score based on the conventional 4‑point Tan scale. The quantitative score is calculated by an automatic software package (StrokeViewer). Interobserver agreement of the manual scores was assessed with the weighted kappa. The Spearman correlation coefficient was calculated to determine the agreement between the manual and automated collateral scores.
resultsThe interobserver agreement was higher for the extended score than for the conventional score with a weighted kappa of 0.70 and 0.65, respectively. For the extended and conventional score, the Spearman correlation coefficient for the agreement with the automated score was 0.78 and 0.76, respectively.
conclusionBecause of the good interobserver agreement and good agreement with quantitative assessment, the extended collateral score is a strong candidate to improve prognostic value of collateral assessment and implementation in clinical practice.
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