PMC7451165_01
The preoperative computed tomography angiography (CTA) revealed the 4.0 mm aneurysm at the anterior communicating artery (ACoA) (arrowhead, a) and the A1 portion of the anterior cerebral artery (arrow, a) with a wide description range from the main trunk to the peripheral parts (b). On the 5 postoperative day, 3.0T time of flight magnetic resonance angiography (TOF-MRA) did not describe the left A1 (arrow, c), but 3.0T ultrashort echo time MRA (UTE-MRA) described it (arrow, d). Both sequences described the cerebral arteries from the main trunk to the peripheral parts with a wide description range, which enabled the assessment of cerebral vasospasm (e and f). (g) is an operative image reconstructed using the preoperative CTA. (h) is that made by postoperative 3.0T UTE-MRA. (i) is a view from the bottom reconstructed using the postoperative 3.0T UTE-MRA, and it revealed the arteries in the vicinity of the clip, the bilateral A1, A2 portions, and the ACoA, in detail. ACoA: anterior communicating artery, Bil: bilateral, ICA: internal carotid artery.
SNI-11-224-g001.jpg
PMC7451165_01_SNI-11-224-g001.jpg
F1
The preoperative CTA revealed the 4.0 mm aneurysm [arrowhead, Figure 1a] and the A1 portion of the anterior cerebral artery [arrow, Figure 1a] with a wide description range from the main trunk to the peripheral parts [Figure 1b]. On the 5 postoperative day, 3.0T TOF-MRA did not describe the left A1 [arrow, Figure 1c], but 3.0T UTE-MRA described it [arrow, Figure 1d]. Both sequences described the cerebral arteries from the main trunk to the peripheral parts with a wide description range, which enabled the assessment of cerebral vasospasm [Figure 1e and f]. In addition, compared to the preoperative CTA [Figure 1g], postoperative 3.0T UTE-MRA revealed the arteries in the vicinity of the clip, the bilateral A1, A2 portions, and the ACoA, in detail [Figure 1h and i].