Specific MR Contrast Media for Liver Imaging

摘要: The two major goals of magnetic resonance imaging (MRI) the liver are cancer detection and tissue characterization. However, in this respect, MRI has a strong competitor, namely computed tomography (CT). Indeed, with advent spiral technique better understanding pharmacokinetics iodinated contrast media, highly optimized CT protocols, such as double-phase CT, have been established clinical practice. This resulted greatly improved imaging. Focal le-sions less than 1 cm now routinely detected (Hollett et al. 1995). although sensitivity detecting focal lesions is first requisite an procedure, characterization small also great importance, because high prevalence (>20%) benign hepatic tumors, particularly hemangiomas, general adult population (Karhunen 1986). Unfortunately, often difficult (Hanafusa Even common cysts, when 10 mm size, can be troublesome. In fact, we encounter same problems those already facing chest CT. Thanks to exquisite resolution obtained lung parenchyma, peripheral nodules, few frequently detected. given patient, it impossible decide certainty whether they represent lesions, granulomas, or malignant metastases. concern, patient known malignancy, presence absence metastases may crucial choice appropriate therapy. One further aspect consider that percutaneous biopsy these liver, low yield for cytologic histologic diagnosis.