OBJECTIVE: The purpose of this prospective study was to compare a novel dual-energy computed tomographic angiography (DECTA) method for postoperative assessment of clipped @entity438 to detect @entity439 remnants and parent artery patency, with catheter-based digital subtraction angiography (DSA). METHODS: @entity1 who underwent microsurgical @entity438 repair were prospectively evaluated after surgery by both DECTA and conventional DSA. CTA was performed using a novel dual-energy method with single source and fast kilovoltage switching (Gemstone Spectral Imaging [GSI]). DSA was performed using biplanar cerebral angiography. An experienced neuroradiologist and a neurosurgeon, both blinded to the original radiologic results, reviewed the images. RESULTS: On DSA, 8 of 15 @entity439 (53%) had a remnant after clipping. All of these remnants were <2 mm except for 1. The only residual @entity439 >2 mm was clearly detected by GSI CTA. Of those 7 DSA-confirmed <2-mm remnants, 5 were detected by GSI CTA. Metal artifacts compromised the image quality in 2 @entity1 . The sensitivity and specificity of GSI CTA for remnant @entity439 <2-mm detection in single clip-treated @entity1 were 100%. In all @entity1 , these were 71.4 % and 100%, respectively. GSI CTA was 100% sensitive and 77% specific to detect parent vessel compromise, with associated positive and negative predictive values of 60% and 100%, respectively. CONCLUSIONS: DECTA is a promising noninvasive alternative to conventional catheter-based angiography for identification of @entity439 remnants and assessment of adjacent arteries after surgical clipping of @entity438 treated by 2 or fewer clips. It allows for a more rapid image acquisition than DSA, is more cost effective, and is widely available at clinical centers.

The Utility of Dual-Energy Computed Tomographic Angiography for the Evaluation of XXXX After Surgical Clipping: A Prospective Study.

@entity1 :: ('9606', 'Species') :: ['Patients', 'patients'] @entity439 :: ('MESH:D000783', 'Disease') :: ['aneurysms', 'aneurysm'] @entity438 :: ('MESH:D002532', 'Disease') :: ['brain aneurysms', 'cerebral aneurysm']
@entity438 :: (MESH:D002532,Disease) :: ['Brain Aneurysms']
