Accuracy of 16-row multislice computed tomographic angiography for assessment of small cerebral aneurysms.

OBJECTIVE: Many cases of subarachnoid hemorrhage are the result of rupture of small cerebral aneurysms. The aim of the study was to assess the diagnostic accuracy of 16-row multislice computed tomographic angiography (CTA) in detecting small cerebral aneurysms (
METHODS: One hundred ninety-two consecutive patients underwent CTA for suspected cerebral aneurysms. All aneurysms prospectively detected by CTA were confirmed by DSA or surgery. This was performed with a 16-detector row machine, with a detector slice of 0.75 mm, reconstruction interval of 0.40 mm, and timing determined by bolus trigger. CTA and DSA images were reviewed by two independent, blinded neuroradiologists who performed aneurysm detection, quantitation, and characterization using maximum-intensity projections, shaded-surface display, and volume-rendering techniques reconstructions.

RESULTS: Combining CTA, DSA, and intraoperative findings, 64 small cerebral aneurysms ( 0.05). Sixteen-slice CTA images show more clarity and accuracy in the relationship of aneurysms to bone structures and adjacent branch vessels.

CONCLUSION: Noninvasive 16-slice CTA is sensitive enough to replace conventional DSA in the triage, diagnosis, and treatment planning in patients with small cerebral aneurysms.