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Fig 2. 3D DSA from the superior and right posterior oblique view at 300 mg I/mL obtained with FPD system (A) and with I.I.-TV system (B). 3D DSA with FPD system shows mild stenosis at the M1 segment of the middle cerebral artery, whereas severe stenosis is observed on 3D DSA with I.I.-TV system (arrowheads). The pseudostenosis artifact caused the minor distortion of aneurysm on 3D DSA with FPD system, whereas the severe distortion of aneurysm on that with I.I.-TV system (arrows).
