Table 1.
Basic demographic data and aneurysm size and location.
Table 2.
Interobserver accordance (kappa-statistic).
Table 3.
Ratings for dome, neck and parent vessel delineation (mean ratings from both readers).
Table 4.
Combined readings of both raters for dome and neck diameter in mm and dome/neck ratio (DNR) for all aneurysms.
Figure 1.
Seventy(subject 5) suffering from basilar tip aneurysm.
White arrows are marking the aneurysm neck, black arrows are marking the aneurysm dome. a: Volume rendering of the 7 Tesla TOF MRA demonstrating the three dimensional structure of the aneurysm; b: transverse plane of the 7 Tesla TOF MRA clearly depicting the aneurysm dome, neck and parent vessel; c: 7 Tesla MPRAGE sequence with excellent delineation of the aneurysm; d: 1.5 Tesla TOF MRA scan with minor irregularities of the parent vessel and aneurysm dome.
Figure 2.
Forty-five years old male patient (subject 6) with partially thrombosed left sided fusiform posterior cerebral artery aneurysm.
White arrows are marking the aneurysm neck, black arrows are marking the aneurysm dome. p1: posterior cerebral artery (p1 segment) a: Volume rendering of the 7 Tesla TOF MRA illustrating the three dimensional structure of the aneurysm (ba: basilar artery; sc: superior cerebellar artery; p2: posterior cerebral artery (p2 segment); ab: aneurysm body); b: transverse plane of the 7 Tesla TOF MRA depicting the parent vessel and part of the aneurysm body; c: Excellent delineation of parent vessel and part of the aneurysm body in 7 Tesla MPRAGE scan; d: Moderate depiction of parent vessel and aneurysm body in 1.5 Tesla TOF MRA.
Figure 3.
Pulsation artifacts near the carotid bifurcation in TOF MRA scans.
The artifacts in 1.5 Tesla (a) and 7 Tesla (b) TOF MRA scans make vessel depiction more difficult (M1: middle cerebral artery (M1 segment); A1: anterior cerebral artery (A1 segment)).
Table 5.
Ratings for artifacts. vessel-tissue contrast (VTC) and overall image quality (mean ratings from both readers).
Table 6.
Combined readings of both raters for signal intensities of left middle cerebral artery, adjacent gray matter and calculated vessel-tissue contrast ratio for all subjects.