2D-FIESTA Sequence of MRI in the Evaluation of the Biliary Tract for the Infants and Young Children / 实用放射学杂志

ABSTRACT

Objective To evaluate the diagnostic value of 2D-FIESTA sequence of MRI in the detection of the biliary tract lesions in infant and young children patients(less than 3 years).Methods 8 infant and young children patients were examined by MRI to evaluatetheir biliary tract.Images were obtained with a 1.5T whole body MRI system(GE Medical System,Milwakee,Wis,USA),using theCARDIAC coil.The patients were sedated by chloral hydrate orally or by pentobarbital sodium intravenously.No contrast agents wererequired.All of the axial,coronal and sagittal images were reviewed on an independent workstation and maximum intensity projection(MIP) and multiplanar reformations(MPR) techniques were applied.Results The 2D-FIESTA pulse sequence results in images in which the hepatic vascular structures and the biliary tract were highlighted.In this way,a clear visualization of the hepatic vessels and biliarytract could be obtained in all 8 cases.MRI could demonstrate the anatomy and pathology of post-transplantation changes in 3 patients,choledochal cysts in 2 patients,anomalous connection between the bile and pancreatic ducts in 1 patient.All the abnormalities were proved by operation.2 examinees were diagnosed normal by MRI and were confirmed by follow-up.Conclusion 2D-FIESTA is a fast sequence that allows the high quality images to be generated without breath-hold and without administration of contrast material.It has a potential wide application in the evaluation of biliary tract in the infant patients.