Prospective comparative study of intermediate-field MR and CT in the evaluation of XXXX .

@entity1 @entity131 @entity548 @entity510 @entity75 @entity772 @entity1410 @entity6075 @entity21 @entity130
Forty @entity1 with @entity6075 were evaluated prospectively with CT and intermediate-field-strength MR imaging to compare the diagnostic efficacies of the two techniques. @entity131 were detected in 38 @entity1 . The severity of injury, as determined by the Glascow @entity772 Scale, ranged from 3 to 14. The sensitivities of CT and MR were calculated for all subgroups of lesions: (1) hemorrhagic and @entity75 ( @entity21 , @entity131 , subcortical gray-matter injury, primary @entity130 ); (2) extraaxial @entity1410 (subdural, epidural); and (3) diffuse @entity548 (subarachnoid, intraventricular). CT and MR (T1- and T2-weighted) studies were both highly and comparably sensitive in the detection of @entity548 . MR scans, however, were much more sensitive in detecting @entity75 . cortical contusions and @entity21 constituted 91.9% of all intraaxial lesions. The sensitivities of the imaging techniques for this combined group of lesions were (1) @entity75 (CT = 17.7%, T1-weighted MR = 67.6%, T2-weighted MR = 93.3%); (2) @entity548 (CT = 89.8%, T1-weighted MR = 87.1%, T2-weighted MR = 92.5%). MR was also significantly better in detecting @entity75 (CT = 9.1%, T1-weighted MR = 81.8%, T2-weighted MR = 72.7%). The sensitivities of the diagnostic studies in the detection of extraaxial @entity1410 were CT = 73.2%, T1-weighted MR = 97.6%, T2-weighted MR = 90.5%). @entity548 was consistently seen with all three imaging studies, but @entity510 was detected much more frequently with CT. In summary, MR has clear advantages over CT in evaluating @entity6075 . Although its sensitivity in detecting @entity548 is similar to that of CT, it is much better than CT in detecting @entity75 , which are more prevalent. MR is more useful than CT in classifying primary and secondary forms of injury and directing treatment. CT's one advantage over MR is its ability to more rapidly assess unstable @entity1 who may need surgery.
