Computerized tomography angiography of ruptured cerebral aneurysms: factors affecting time to maximum contrast concentration

Abstract

In an emergency situation, CT angiography with a dynamic prescan may be an alternative to magnetic resonance angiography or digital subtraction angiography in the diagnosis of ruptured aneurysms. This modality would also be useful for the precise assessment of small aneurysms, blebs, and aneurysms adjacent to the cavernous sinus.

Acute Aneurysm Surgery Using Three-Dimensional Ct Angiogrphy Without Conventional Catheter Angiography

“…"lls)zo)zl)zz)z 3 J Aneurysms as small as 1 mm were not usually detected with this modality. 18 J In our series, however, the smallest aneurysm visualized on 3D-CT A was 0.8 mm in diameter. Therefore, our results were superior to those reported in the previous studies.…”

“…Third, 3D-CT A does not supply dynamic information of the cerebral circulation, such as collateral flow. 18 ) Last, the aneurysms located close to the skull base may not be visible against the bony structures, 12 ) 15 ) 24 ) which is a disadvantage when using 3D-CT A, but the findings of the three-dimensional anatomical relation of the aneurysm to the skull can be an advantage for surgery.…”

Three-dimensional computerized tomography angiography in patients with hyperacute intracerebral hemorrhage

“…Unlike angiography, 3D-CT angiography is noninvasive. 14,21,29,31,34 However, not many institutions presently have the resources to perform emergency 3D-CT angiography at all times of the day.…”

“…13,21,39 One major task in patient management is to determine whether a hemorrhage is secondary to an underlying structural vascular abnormality, such as an AVM, a cerebral aneurysm, or moyamoya disease, so that appropriate treatment can be administered to prevent rebleeding. Computerized tomography angiography represents a noninvasive alternative for vascular abnormality assessment; 13,14,21,29,31,34 its strengths and limitations have been evaluated critically in recent years. 29,38 This modality has been demonstrated to be highly sensitive for detecting aneurysms larger than 3 mm.…”

“…Computerized tomography angiography represents a noninvasive alternative for vascular abnormality assessment; 13,14,21,29,31,34 its strengths and limitations have been evaluated critically in recent years. 29,38 This modality has been demonstrated to be highly sensitive for detecting aneurysms larger than 3 mm. 13,21,29,32 The orientation of cerebral aneurysms can be difficult to determine on 3D-CT angiography when they cause only subarachnoid hemor-rhage.…”