Article Figures & Data
Figures
- Fig 1.
A and B, CTA, transversal and coronal MIP reconstructions; image thickness 10 mm. C and D, VPCTA, transversal and coronal MIP reconstructions; image thickness 10 mm. The same window settings were used for all reconstructions. Occlusion of the distal main branch of the right middle cerebral artery is demonstrated in CTA and VPCTA (arrows). In VPCTA, veins are less contrasted.
- Fig 2.
A and B, CTA, coronal and sagittal MIP reconstructions; image thickness 10 mm. C and D, VPCTA, coronal and sagittal MIP reconstructions; image thickness 10 mm. The same window settings were used for all reconstructions. Occlusion of the A2 segment of the left anterior cerebral artery is clearly visible in CTA and VPCTA (arrows).
- Fig 3.
A and B, CTA, sagittal and coronal MIP reconstructions; image thickness 10 mm. C and D, VPCTA, sagittal and coronal MIP reconstructions; image thickness 10 mm. The same window settings were used for all reconstructions. Stenosis >50% of the basilar artery is pictured in CTA and VPCTA (arrows). Generally, the most caudal part of the basilar artery is not covered in VPCTA, as direct irradiation of the eye lenses has to be avoided.
- Fig 4.
A, CTA, transversal MIP reconstruction; image thickness 10 mm. B, VPCTA, transversal MIP reconstruction; image thickness 10 mm. The same window settings were used for both reconstructions. While CTA was scored normal, in VPCTA, stenosis >50% of a proximal right M2 segment was rated (arrows).
Tables
Modality Image Quality 1 2 3 4 CTA (n [%]) 0 (0.0) 3 (1.8) 90 (55.2) 70 (43.0) VPCTA (n [%]) 0 (0.0) 1 (0.6) 135 (82.8) 27 (16.6) Note:—P < .01.
CTA Total Diagnostic Nondiagnostic VPCTA Diagnostic 159 3 162 Nondiagnostic 1 0 1 Total 160 3 163 Note:—P = 1.00.
Vascular Segment (1) Not Pictured in VPCTA CTA VPCTA Number of Discrepancies P (2) Normal or Stenosis <50 % (3) Stenosis >50 % (4) Occlusion (2) Normal or Stenosis <50 % (3) Stenosis >50 % (4) Occlusion Right ICA 3 152 0 4 152 0 4 0 1 Left ICA 5 148 0 6 148 0 6 0 1 Right proximal M1 1 152 0 6 152 0 6 0 1 Right distal M1 1 150 0 8 150 0 8 0 1 Left proximal M1 0 154 0 5 154 0 5 0 1 Left distal M1 0 150 1 8 150 1 8 0 1 Right M2–3 0 148 0 11 147 1 11 1 .32 Left M2–3 0 147 0 12 147 0 12 2 1 Right ACA 0 159 0 0 159 0 0 0 1 Left ACA 0 155 0 4 155 0 4 0 1 BA 1 151 3 4 151 3 4 0 1 Right PCA 0 155 2 2 155 2 2 0 1 Left PCA 0 153 1 5 153 1 5 0 1 Note:—In CTA, all vessel segments were pictured. ACA indicates anterior cerebral artery; PCA, posterior cerebral artery; BA, basilar artery.
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