Helical CT of the local spread of carcinoma of the gallbladder: evaluation according to the XXXX system in @entity1 who underwent surgical resection.

@entity1 @entity189 @entity2802
OBJECTIVE: Our aim was to evaluate the performance of helical CT as an aid in the preoperative diagnosis of the spread of @entity189 of the gallbladder. MATERIALS AND METHODS: Two radiologists retrospectively reviewed both hard-copy and soft-copy (on a monitor with multiplanar reconstruction capability) versions of helical CT scans (3-mm collimation and 3-mm reconstruction) of 21 @entity1 who had undergone surgical resection for @entity189 of the gallbladder. The local spread of the disease was evaluated according to the @entity2802 system, and the results were correlated to the pathologic findings. Inter- and intraobserver differences were checked with kappa statistics. Results of the consensus interpretations were used to calculate sensitivity, specificity, and accuracy of helical CT. RESULTS: No significant inter- or intraobserver differences were found in any T category evaluation. The sensitivities of the hard-copy consensus interpretations in the diagnosis of T1, T2, T3, and T4 lesions were 33%, 64%, 80%, and 100%, respectively; specificities of hard-copy interpretations were 94%, 80%, 81%, and 95%, respectively. For soft-copy (monitor) consensus interpretations, the sensitivities for the diagnosis of T1, T2, T3, and T4 lesions were 33%, 73%, 80%, and 100%, respectively; the specificities of soft-copy interpretations were 94%, 80%, 88%, and 95%, respectively. Overall accuracy of the hard-copy interpretation was 83%; the overall accuracy of the soft-copy interpretation was not significantly different-86%. CONCLUSION: Helical CT provided 83-86% accuracy in the diagnosis of the local extent of @entity189 of the gallbladder, showing acceptable sensitivity and specificity for the T2 and more advanced lesions but poor sensitivity for the T1 lesions. Use of a monitor with multiplanar reconstructions of the CT data did not significantly improve the diagnostic accuracy.
