Interrater Agreement and Detection Accuracy for Medium-Vessel Occlusions Using Single-Phase and Multiphase CT Angiography

J.M. Ospel; F. Bala; R.V. McDonough; O. Volny; N. Kashani; W. Qiu; B.K. Menon; M. Goyal

doi:10.3174/ajnr.A7361

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Interrater Agreement and Detection Accuracy for Medium-Vessel Occlusions Using Single-Phase and Multiphase CT Angiography

J.M. Ospel, F. Bala, R.V. McDonough, O. Volny, N. Kashani, W. Qiu, B.K. Menon and M. Goyal

American Journal of Neuroradiology November 2021, DOI: https://doi.org/10.3174/ajnr.A7361

J.M. Ospel

aFrom the Department of Diagnostic Imaging (J.M.O., F.B., R.V.M., N.K., W.Q., B.K.M., M.G.)

cDepartment of Radiology (J.M.O.), University Hospital of Basel, Basel, Switzerland

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F. Bala

aFrom the Department of Diagnostic Imaging (J.M.O., F.B., R.V.M., N.K., W.Q., B.K.M., M.G.)

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R.V. McDonough

aFrom the Department of Diagnostic Imaging (J.M.O., F.B., R.V.M., N.K., W.Q., B.K.M., M.G.)

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O. Volny

dCzech National Centre for Evidence-Based Healthcare and Knowledge Translation (O.V.), Masaryk University, Brno, Czech

eDepartment of Neurology (O.V.), University Hospital Ostrava, Ostrava, Czech

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N. Kashani

aFrom the Department of Diagnostic Imaging (J.M.O., F.B., R.V.M., N.K., W.Q., B.K.M., M.G.)

bDepartment of Clinical Neurosciences (N.K., B.K.M., M.G.), University of Calgary, Calgary, Alberta, Canada

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W. Qiu

aFrom the Department of Diagnostic Imaging (J.M.O., F.B., R.V.M., N.K., W.Q., B.K.M., M.G.)

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B.K. Menon

aFrom the Department of Diagnostic Imaging (J.M.O., F.B., R.V.M., N.K., W.Q., B.K.M., M.G.)

bDepartment of Clinical Neurosciences (N.K., B.K.M., M.G.), University of Calgary, Calgary, Alberta, Canada

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M. Goyal

aFrom the Department of Diagnostic Imaging (J.M.O., F.B., R.V.M., N.K., W.Q., B.K.M., M.G.)

bDepartment of Clinical Neurosciences (N.K., B.K.M., M.G.), University of Calgary, Calgary, Alberta, Canada

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FIGURE.
Proportion of MeVOs that were correctly classified as MeVOs (green), misclassified as LVOs (yellow), and misclassified as no occlusion (red) on single-phase and multiphase CTA, stratified per occlusion site. A, Proportions for M2, M3/4, A2, and A3/4 MeVOs. B, Proportions for P2 MeVOs. sp-CTA indicates single-phase CT angiography.

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Interrater Agreement and Detection Accuracy for Medium-Vessel Occlusions Using Single-Phase and Multiphase CT Angiography