문맥조영 CT의 효용성과 문제점

Abstract

PURPOSE: To evaluate the usefulness, patterns and appearances of false positive lesions, and technicalporblems of CTAP(CT Arterioportography). MATERIALS AND METHODS: CTAP was done in 45 patients in whom hepaticlesions were suggested on other radiologic studies. CTAP findings were compared with the informations obtained byoperations, biopsies, and follow-up imagings. Additional findings, which were not detected in other radiologicstudies, false positive manifestations, and technical errors were analyzed. RESULTS: CTAP detected 51 additionalhepatic lesions which are not detected in other imaging studies, Of the 51 lesions, ten were true positive hepatictumors, 2 were inflammatory lesions and 39 were false positive lesions. False positive lesions included perfusiondefects of periportal and perifissural areas, subcapsular perfusion defects and nonlobar, nonsegmental geographicperfusion defects. In 2 cases, CTAP aided in deciding the surgical strategy. On the other hand, there were 4 casescausing interpretational confusion and 6 cases of improper imaging due to technical errors. CONCLUSION: CTAP wasvaluable in detection of additional hepatic cancer lesion as well as in making the treatment plan, However, sincemany false positive lesions and improper imaging due to technical error occur during the examination, theunderstanding of such problems is essential for correct interpretation of CTAP.