PURPOSE: To assess the value of noncontrast, arterial and portal venous phase of triphasic helical CT in detecting and characterising focal @entity409 . MATERIAL AND METHODS: 120 @entity1 with focal @entity409 underwent triphasic helical CT examinations with a collimation of 6.5 mm at a table feed of 6.5 mm/s. The liver scans were obtained before the administration of 120 ml of non-ionic contrast material (flow 2 or 3 ml/s), at the arterial phase, and at the portal venous phase (20 s, respectively 60 s after injection). @entity1 were divided into four groups according to the underlying disease and enhancement pattern. The studies were evaluated retrospectively. RESULTS: A total of 269 lesions was seen. The noncontrast phase (NCP) revealed 86% of lesions, the arterial phase (AP) 95% and the portal venous phase ( @entity12468 ) 91%. In the first group of @entity75 ( @entity14 ) all lesions (73/73) were detected in the @entity12468 . In the second group of @entity75 ( @entity0 , @entity320 ) the combination of AP and @entity12468 revealed 73 of 74 lesions. In the third group of @entity1 with unknown primary and detected lesions by sonography all 89 lesions were detected with the combination of AP and @entity12468 . In the fourth group of @entity1 with @entity82 3 of 33 lesions were detected exclusively during the AP and 3 other lesions exclusively during the NCP. To make a definitive diagnosis of focal @entity409 the value of the three phases was as follows: to characterise lesions the @entity12468 was sufficient in 62%, the combination of @entity12468 and AP in 27%, and the combination of all three phases in 11%. CONCLUSIONS: If @entity75 are suspected examination during @entity12468 is sufficient. In cases of @entity75 and lesions of unknown primary AP and @entity12468 should be combined. Unenhanced scans are of additional diagnostic value only in @entity1 with @entity1575 .

[3-phase spiral CT of the liver, Value of non-contrast arterial and portal venous studies in the diagnosis of focal XXXX ].

@entity1 :: ('9606', 'Species') :: ['Patients', 'patients'] @entity82 :: ('MESH:D005355', 'Disease') :: ['cirrhosis'] @entity0 :: ('MESH:D001943', 'Disease') :: ['breast cancer'] @entity75 :: ('MESH:D001927', 'Disease') :: ['hypervascular lesions', 'hypovascular lesions'] @entity409 :: ('MESH:D008107', 'Disease') :: ['liver lesions', 'liver disease'] @entity12468 :: ('CHEBI:53245', 'Chemical') :: ['PVP'] @entity14 :: ('MESH:D015179', 'Disease') :: ['colorectal carcinoma'] @entity1575 :: ('MESH:D008103', 'Disease') :: ['liver cirrhosis'] @entity320 :: ('MESH:D008545', 'Disease') :: ['melanoma']
@entity409 :: (MESH:D008107,Disease) :: ['liver lesions']
