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AJNR - American Journal of Neuroradiology

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CT Angiography with Electrocardiographically Gated Reconstruction for Visualizing Pulsation of Intracranial Aneurysms: Identification of Aneurysmal Protuberance Presumably Associated with Wall Thinning

Motoharu Hayakawa^a, Kazuhiro Katada^b, Hirofumi Anno^c, Shuei Imizu^a, Junichi Hayashi^a, Keiko Irie^a, Makoto Negoro^a, Yoko Kato^a, Tetsuo Kanno^a and Hirotoshi Sano^a

^a Department of Neurosurgery, School of Medicine, Fujita Health University, Aichi, Japan
^b Department of Radiology, School of Medicine, Fujita Health University, Aichi, Japan
^c Faculty of Radiological Technology, School of Health Sciences, Fujita Health University, Aichi, Japan

View larger version (82K): [in a new window]   FIG 1. 3D-CT angiography of large incracranial aneurysm of the left MCA. The aneurysm with an associated bleb is seen at the origin of the left MCA (arrow).

View larger version (60K): [in a new window]   FIG 2. 4D-CT angiography of large incracranial aneurysm of the left MCA, showing ECG-gated reconstruction of an intracranial aneurysm of the left MCA. The cardiac cycle was divided into 20 phases at 5% increments. During the period from 90% to 5% of the R-R interval, a small protuberance appeared at the bleb (arrow).

View larger version (94K): [in a new window]   FIG 3. 3D-CT angiography of incracranial aneurysm of the right MCA . The aneurysm with an associated bleb is seen at the origin of the right MCA (arrow).

View larger version (98K): [in a new window]   FIG 4. 4D-CT angiography of large incracranial aneurysm of the left MCA. Detail of Figure 1, 80–95%, 0–15%. A small protuberance from the bleb is seen during the period from 90% to 5% of the R-R interval (arrow).

View larger version (88K): [in a new window]   FIG 5. 4D-CT angiography of incracranial aneurysm of the right MCA. A small protuberance from the bleb is seen during the period from 45% to 55% of the R-R interval (arrow).

View larger version (45K): [in a new window]   FIG 6. Operation view of left MCA large aneurysm. Intracranial aneurysm of the left MCA was clipped partially. The aneurysmal wall thinning is identified (arrow).

View larger version (67K): [in a new window]   FIG 7. Operation view of right MCA aneurysm. Intracranial aneurysm of the right MCA was clipped. The ruptured aneurysmal bleb is identified (arrow).