Przydatność poszczególnych faz wielofazowej spiralnej tomografii komputerowej w wykrywaniu przerzutów nowotworowych do wątroby

Bibliogr. s. 66-67

Background: In view of the constant progress in methods of treating liver metastases, new standards for radiological examinations must be developed. The purpose o f this study was to evaluate the ability of sequential phases of multiphase spiral CT (sCT) to detect liver metastases and their segmental localization. Material/Methods: sCT was performed on 100 patients with hepatic metastases. sCT included unenhanced scans (NC) and those o f the hepatic arterial-dominant (HAP), portal venous-dominant (PVP), and equilibrium phases (EP). In each phase, the number, size o f detectable lesions, and the accuracy of the topographic report of lesion location in liver segments were evaluated. Patients with primary cancer of the gastrointestinal tract constituted almost 70% of the group. Results: A total of 354 liver metastases were detected by sCT. PVP revealed 346 (97.7%), HAP 298 (84.2%), and EP 241 (68.1%) secondary lesions. NC scans revealed 195 metastases (55.1%) when evaluated in the 'abdominal window'. The exact localization of metastases in liver segments was established in PVP in 88% o f cases, in HAP 76%, in EP 70%, and in the NC phase in 71% of cases. Lesion diameter ranged from 4 to 127 mm (median: 21 mm). Lesions of more than 30 mm in diameter were clearly detectable in each phase of the CT examination. Conclusions: PVP in sCT has the highest sensitivity in detecting liver metastases and contributes to the most adequate segmental localization. In the standard diagnosis of liver metastases, biphasic examination including HAP and PVP should be performed.