Comparison of Subtracted CTA from CTP and Digital Subtraction Angiography in Residue Evaluation of Treated Intracranial Aneurysms.
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BACKGROUND: Assessing clipped intracranial aneurysms for residues or incomplete occlusions is critical. Digital subtraction angiography (DSA) has been the gold standard for this. Previously, we presented subtracted computed tomography angiography (sub-CTA) from computed tomography perfusion as a more effective noninvasive technique for clipped aneurysms. The aim of this study was to compare effectiveness of sub-CTA with DSA in residue evaluation.