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MDCTA of Carotid Plaque Degree of Stenosis: Evaluation of Interobserver Agreement

¹ Department of Science of the Images, Policlinico Universitario, s.s. 554 Monserrato, Cagliari 09045, Italy.
² Institute of Radiology of the University of Cagliari, 46 Hospital St., Cagliari 09126, Italy.

View larger version (112K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 1A —Fatty plaque (average attenuation, 39 H) in 68-year-old man. MDCT angiography axial images obtained using window settings 1 (A), 2 (B), and 3 (C). Plaque that produced stenosis in left internal carotid artery is indicated by arrowhead. Window setting 1, window width preset at 500 H, level of 150 H; window setting 2, window width preset at 750 H, level of 200 H; and window setting 3, window width preset at 850 H, level of 300 H.

View larger version (106K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 1B —Fatty plaque (average attenuation, 39 H) in 68-year-old man. MDCT angiography axial images obtained using window settings 1 (A), 2 (B), and 3 (C). Plaque that produced stenosis in left internal carotid artery is indicated by arrowhead. Window setting 1, window width preset at 500 H, level of 150 H; window setting 2, window width preset at 750 H, level of 200 H; and window setting 3, window width preset at 850 H, level of 300 H.

View larger version (103K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 1C —Fatty plaque (average attenuation, 39 H) in 68-year-old man. MDCT angiography axial images obtained using window settings 1 (A), 2 (B), and 3 (C). Plaque that produced stenosis in left internal carotid artery is indicated by arrowhead. Window setting 1, window width preset at 500 H, level of 150 H; window setting 2, window width preset at 750 H, level of 200 H; and window setting 3, window width preset at 850 H, level of 300 H.

View larger version (93K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 2A —Mixed plaque (average attenuation, 57 H) in 64-year-old woman. MDCT angiography axial images obtained using window settings 1 (A), 2 (B), and 3 (C). Plaque that produced stenosis in left internal carotid artery is indicated by arrowhead. Note some calcific eccentric spots in this mixed plaque. Window setting 1, window width preset at 500 H, level of 150 H; window setting 2, window width preset at 750 H, level of 200 H; and window setting 3, window width preset at 850 H, level of 300 H.

View larger version (86K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 2B —Mixed plaque (average attenuation, 57 H) in 64-year-old woman. MDCT angiography axial images obtained using window settings 1 (A), 2 (B), and 3 (C). Plaque that produced stenosis in left internal carotid artery is indicated by arrowhead. Note some calcific eccentric spots in this mixed plaque. Window setting 1, window width preset at 500 H, level of 150 H; window setting 2, window width preset at 750 H, level of 200 H; and window setting 3, window width preset at 850 H, level of 300 H.

View larger version (87K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 2C —Mixed plaque (average attenuation, 57 H) in 64-year-old woman. MDCT angiography axial images obtained using window settings 1 (A), 2 (B), and 3 (C). Plaque that produced stenosis in left internal carotid artery is indicated by arrowhead. Note some calcific eccentric spots in this mixed plaque. Window setting 1, window width preset at 500 H, level of 150 H; window setting 2, window width preset at 750 H, level of 200 H; and window setting 3, window width preset at 850 H, level of 300 H.

View larger version (102K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 3A —Calcified plaque (average attenuation, 976 H) in 63-year-old man. MDCT angiography axial images obtained using window settings 1 (A), 2 (B), and 3 (C). Residual lumen in right carotid bifurcation is indicated by arrowhead. Window setting 1, window width preset at 500 H, level of 150 H; window setting 2, window width preset at 750 H, level of 200 H; and window setting 3, window width preset at 850 H, level of 300 H.

View larger version (93K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 3B —Calcified plaque (average attenuation, 976 H) in 63-year-old man. MDCT angiography axial images obtained using window settings 1 (A), 2 (B), and 3 (C). Residual lumen in right carotid bifurcation is indicated by arrowhead. Window setting 1, window width preset at 500 H, level of 150 H; window setting 2, window width preset at 750 H, level of 200 H; and window setting 3, window width preset at 850 H, level of 300 H.

View larger version (92K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 3C —Calcified plaque (average attenuation, 976 H) in 63-year-old man. MDCT angiography axial images obtained using window settings 1 (A), 2 (B), and 3 (C). Residual lumen in right carotid bifurcation is indicated by arrowhead. Window setting 1, window width preset at 500 H, level of 150 H; window setting 2, window width preset at 750 H, level of 200 H; and window setting 3, window width preset at 850 H, level of 300 H.

View larger version (84K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 4A —Maximum-intensity-projection postprocessed images of calcified plaque (average attenuation, 976 H) in 63-year-old man. MDCT angiography obtained using window settings 1 (A), 2 (B), and 3 (C). Residual lumen in right carotid bifurcation is indicated by arrowhead. Window setting 1, window width preset at 500 H, level of 150 H; window setting 2, window width preset at 750 H, level of 200 H; and window setting 3, window width preset at 850 H, level of 300 H.

View larger version (87K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 4B —Maximum-intensity-projection postprocessed images of calcified plaque (average attenuation, 976 H) in 63-year-old man. MDCT angiography obtained using window settings 1 (A), 2 (B), and 3 (C). Residual lumen in right carotid bifurcation is indicated by arrowhead. Window setting 1, window width preset at 500 H, level of 150 H; window setting 2, window width preset at 750 H, level of 200 H; and window setting 3, window width preset at 850 H, level of 300 H.

View larger version (87K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 4C —Maximum-intensity-projection postprocessed images of calcified plaque (average attenuation, 976 H) in 63-year-old man. MDCT angiography obtained using window settings 1 (A), 2 (B), and 3 (C). Residual lumen in right carotid bifurcation is indicated by arrowhead. Window setting 1, window width preset at 500 H, level of 150 H; window setting 2, window width preset at 750 H, level of 200 H; and window setting 3, window width preset at 850 H, level of 300 H.

View larger version (69K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 5A —Multiplanar reconstruction postprocessed images of calcified plaque (average attenuation, 976 H) in 63-year-old man. MDCT angiography images obtained using window settings 1 (A), 2 (B), and 3 (C). Residual lumen in right carotid artery bifurcation is indicated by arrowhead. Window setting 1, window width preset at 500 H, level of 150 H; window setting 2, window width preset at 750 H, level of 200 H; and window setting 3, window width preset at 850 H, level of 300 H.

View larger version (70K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 5B —Multiplanar reconstruction postprocessed images of calcified plaque (average attenuation, 976 H) in 63-year-old man. MDCT angiography images obtained using window settings 1 (A), 2 (B), and 3 (C). Residual lumen in right carotid artery bifurcation is indicated by arrowhead. Window setting 1, window width preset at 500 H, level of 150 H; window setting 2, window width preset at 750 H, level of 200 H; and window setting 3, window width preset at 850 H, level of 300 H.

View larger version (75K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 5C —Multiplanar reconstruction postprocessed images of calcified plaque (average attenuation, 976 H) in 63-year-old man. MDCT angiography images obtained using window settings 1 (A), 2 (B), and 3 (C). Residual lumen in right carotid artery bifurcation is indicated by arrowhead. Window setting 1, window width preset at 500 H, level of 150 H; window setting 2, window width preset at 750 H, level of 200 H; and window setting 3, window width preset at 850 H, level of 300 H.

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