Article Figures & Data
Figures
- Fig 1.
A patient with 3 aneurysms treated with either a flow diverter or coils. Axial view in which both a flow diverter (arrows) and coils are visible to illustrate the effect of single-energy metal artifact reduction. Non-SEMAR CTA (left), CTA with SEMAR (middle), and subtraction CTA with SEMAR (right) demonstrate the effects of SEMAR on metal artifacts.
- Fig 2.
Description of study cohort.
- Fig 3.
Residual aneurysm located at the origin of the posterior communicating artery after flow diverter placement in the internal carotid artery. Fluoroscopy (A) with a flow diverter clearly visible, DSA (B), subtraction CTA 3D view (C), and subtraction CTA thin-slice 1-mm MIPs (D–F).
- Fig 4.
Residual aneurysm (arrows) located at the right carotid artery after flow-diverter placement in the internal carotid artery. Sagittal view of 45-mm-slice MIPs on subtraction CTA (left) and DSA (right).
- Fig 5.
Residual aneurysm (arrows) located at the left anterior cerebral artery after flow-diverter placement in the internal carotid artery and middle cerebral artery. Coronal view of 20-mm-slice MIPs on subtraction CTA (left) and posteroanterior-acquisition DSA (right). Two previously coiled aneurysms on the contralateral carotid artery and anterior communicating artery can be seen on the subtraction CTA.
- Fig 6.
Small residual aneurysm (arrows) located at the left carotid artery after flow-diverter placement in the internal carotid artery. Coronal view of 20-mm-slice MIP on subtraction CTA (left), coronal subtraction CTA thin-slice 1-mm MIP (middle), and posteroanterior-acquisition DSA (right).
Tables
Number of discrepancies between sCTA and DSA for both readers
Intracranial Aneurysm Feature Discrepancies between sCTA and DSA Comments Reader 1 Reader 2 Aneurysm closure (Raymond 1) 0 0 NA Complete device deployment 0 1 Device deployment was scored complete on sCTA but incomplete on DSA; a second reading of this case confirmed complete device deployment on DSA Complete wall apposition 1 1 In 1 patient, both readers scored wall apposition incomplete on sCTA but complete on DSA; a second reading of this case confirmed incomplete wall apposition on DSA Complete neck coverage 0 0 NA Vessel patency distal (nonstenotic) 1 0 Vessel patency was scored nonstenotic on sCTA but stenotic on DSA in 1 case; a second reading confirmed nonstenosis on DSA Vessel patency proximal (nonstenotic) 0 0 NA Side branch patency (no change) 0 1 In 1 case, a side branch was missed on follow-up sCTA; a second reading of the case confirmed a patent side branch on sCTA Note:—NA indicates not applicable.
