We investigated the accuracy of spiral computed tomography angiography (CTA) in the detection and study of @entity438 by comparing CTA with selective angiograms and surgical findings. Twenty-six @entity1 (9 @entity1 and 17 @entity1 ; mean age 53.1 +/- 1.8 years) with suspected @entity438 were submitted to CTA (1- to 2-mm slices, pitch 1:1, 24 s, RI = 1) after a conventional CT examination showing @entity510 ( @entity510 ) in 19 cases and during neuroradiological investigations performed for other reasons in 7 cases. One hundred twenty to 150 ml iodate contrast agent (0.3-0.4 gI/ml) were injected intravenously at 5 ml/s rate and with 12- to 25-s delay calculated with a preliminary test bolus. Three-dimensional shaded surface display (3D SSD) and maximum intensity projection (MIP) reconstructions were obtained from axial images. Then, within 48 h, all @entity1 were submitted to digital subtraction angiography (DSA), with separate assessment of CTA and DSA findings. Twenty-two @entity439 shown by CTA were confirmed at DSA and surgery (true positives), whereas the vascular lesion was not confirmed at DSA in 2 cases (false positives). The presence of @entity438 was excluded at both CTA and subsequent DSA in 7 cases (true negatives) and there were no false negatives; sensitivity was 100 %, specificity 77.8 %, and diagnostic accuracy 93.5 %. Computed tomography angiography @entity439 location was confirmed at surgery in all cases, with very high accuracy in assessing the presence of an @entity439 (100 %). Computed tomography angiography accurately depicted the @entity439 shape in 20 of 22 cases, but failed to depict its multilobed nature in 2 cases. The mean @entity439 diameter calculated at CTA was 0.99 +/- 0.12 cm vs 1.09 +/- 0.11 cm at surgery (p < 0.01). The present results suggest that the high sensitivity of CTA, if confirmed by further studies, might help in avoiding having to resort to arteriography after negative CTA in @entity510 @entity1 .

Spiral CT angiography and surgical correlations in the evaluation of XXXX .

@entity1 :: ('9606', 'Species') :: ['women', 'patients', 'men'] @entity510 :: ('MESH:D013345', 'Disease') :: ['SAH', 'subarachnoid hemorrhage'] @entity439 :: ('MESH:D000783', 'Disease') :: ['aneurysms', 'aneurysm', 'aneurysm neck'] @entity438 :: ('MESH:D002532', 'Disease') :: ['intracranial aneurysms']
@entity438 :: (MESH:D002532,Disease) :: ['intracranial aneurysms']
