Detection and assessment of intracranial aneurysms: value of CT angiography with shaded-surface display.

Abstract

OBJECTIVE.The purpose of this study was to evaluate the efficacy of circle of Wil-

Digital Subtraction Angiography Findings in Aneurysmal Subarachnoid Haemorrhage: Experience of 30 Cases in Bangladesh

“…Morphology of the aneurysms is important in determining subsequent therapeutic procedure. It was found in this study that majority of the aneurysms were saccular and had a narrow neck, which is also reported by most of the observers 4,9,14,16 .…”

Detection of Aneurysms by 64-Section Multidetector CT Angiography in Patients Acutely Suspected of Having an Intracranial Aneurysm and Comparison with Digital Subtraction and 3D Rotational Angiography

“…The sensitivities in initial studies of SSCTA varied widely, ranging from 67% to 100%, with significant difficulty noted in detecting aneurysms less than 4 mm. [17][18][19][20][21][22] When 4MSCTA emerged, results among several studies were also variable but largely demonstrated that the sensitivity was more than 90% in aneurysms at or more than 4 mm, whereas the results for aneurysms less than 4 mm in size were controversial; in particular, the NPVs were reported as far under 90% on a per-aneurysm basis of evaluation, suggesting that smaller aneurysms less than 4 mm could be missed by 4MSCTA. [9][10][11] Similar but slightly improved results have been reported with 16MSCTA, with further improved NPVs and sensitivity, though there still remains some difficulty in aneurysms less than 3-4 mm.…”

Diagnostic Accuracy of Computed Tomographic Angiography (CTA) in the Management of Aneurysmal Subarachnoid Haemorrhage (SAH)

“…Krogi et al [26] had 35 patients in their study & observed that 14 aneurysms were very small, 16 were small, 14 were medium and three were large. Liang et al [6] in their study by both CT angiography and conventional angiography detected 15 aneurysms in 14 patients. The maximum dimensions of the aneurysm on CT angiography were less than 3.0 mm in three patients, 3.0-5.0mm in four patients and more than 5.0mm in eight patients.…”

“…Until now cerebral digital subtraction angiography (DSA) has been used as the criterion standard for aneurysmal detection and planning of their microsurgical treatment. However, as the method for diagnosis of subarachnoid hemorrhage moved from lumbar puncture to computed tomography, it seems that method for diagnosis of intracranial aneurysms is also moving from digital subtraction angiography to computed tomographic angiography (CTA), especially CTA with three dimensional reconstructions of images [5][6][7][8]. DSA has several disadvantages other then time delay, including invasiveness because of required arterial puncture and intra arterial catheter manipulation, high skill level to perform the procedure and relatively high cost [9][10][11].…”