Multi-Section CT Angiography for Detection of Cerebral Aneurysms
Mehmet Teksama,b,
Alexander McKinneya,
Sean Caseya,
Martin Asisa,
Stephen Kieffera and
Charles L. Truwita
a Department of Radiology, University of Minnesota, Minneapolis, MN
b Department of Radiology, Baskent University Medical School, Ankara, Turkey
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FIG 1. Images obtained in a 45-year-old woman with severe headache.
A, Unenhanced CT scan of the head shows subarachnoid hemorrhage in the right sylvian fissure (arrow), with mild hydrocephalus. R, right; P, posterior.
B, 3D volume-rendered image (lateral) shows inferiorly and posteriorly directed saccular aneurysm at the origin of the right posterior communicating artery (arrow). S, superior; I, inferior; P, posterior; A, anterior.
C, Preoperative right internal carotid digital subtraction angiogram (right anterior oblique projection) shows inferiorly and laterally directed saccular aneurysm at the origin of the posterior communicating artery (arrow).
D, Intraoperative right internal carotid digital subtraction angiogram (anteroposterior projection) shows successful clip placement in the posterior communicating artery aneurysm.
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FIG 2. Images obtained in a 49-year-old woman with severe headache.
A, Unenhanced CT scan of the head shows subarachnoid hemorrhage in the left cerebellopontine angle cistern (arrow).
B, 3D volume-rendered image (posteroanterior) shows superiorly, medially, and anteriorly directed saccular aneurysm (white arrow), which is incorporated into the origin of posterior inferior cerebellar artery (black arrow). S, superior; I, inferior; R, right; L, left.
C, Preoperative left vertebral artery digital subtraction angiogram (anteroposterior projection) shows saccular aneurysm projecting superiorly and medially at the origin of the posterior inferior cerebellar artery. Note the hypoplastic P1 segment of the posterior cerebral artery.
D, Intraoperative left vertebral artery digital subtraction angiogram (anteroposterior projection) shows successful clip placement in the aneurysm without occlusion of the posterior inferior cerebellar artery.
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FIG 3. Images obtained in a 41-year-old woman with headache.
A, 3D volume-rendered image (posteroanterior) shows aneurysm at the origin of the left superior cerebellar artery (arrow). S, superior; I, inferior; R, right; L, left.
B, Maximum intensity projection image (anteroposterior) shows aneurysm at the origin of the left superior cerebellar artery (arrow). S, superior; I, inferior; R, right; L, left.
C, Left vertebral artery digital subtraction angiogram (anteroposterior projection) shows aneurysm at the origin of the left superior cerebellar artery. This patient underwent attempted treatment by GDC embolization. However, the aneurysm was thrombosed during the procedure before coil embolization. The patient was followed up and did not have any significant complaint as of the time of this writing.
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AJNR - American Journal of Neuroradiology