Chang Jin Han

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OBJECTIVE Our purposes were to determine whether a single application of radiofrequency energy to normal bone can create coagulation necrosis reproducibly and to assess the accuracy of MRI at revealing the extent of radiofrequency-induced thermal bone injury. MATERIALS AND METHODS Using a 200-W generator and a 17-gauge cooled-tip electrode, a total of 11(More)
OBJECTIVE The purpose of our study was to determine useful CT criteria for differentiating serous oligocystic adenomas of the pancreas from other similarly presenting neoplasms, such as mucinous cystadenoma and intraductal papillary mucinous tumor of the branch duct type. MATERIALS AND METHODS Forty-one patients with histologically confirmed macrocystic(More)
OBJECTIVE Our aim was to assess the diagnostic performance of contrast-enhanced agent detection sonographic imaging to characterize focal hepatic lesions in patients with diffuse liver disease in comparison with baseline sonographic images and to determine whether agent detection imaging can reduce the necessity of further diagnostic workup for lesion(More)
PURPOSE The purpose of this study was to characterize the differences in CT enhancement pattern among the morphologic subtypes of cholangiocarcinomas. MATERIALS AND METHODS Unenhanced, hepatic arterial (HAP), and portal venous phase (PVP) CT images of 84 patients with pathologically proven cholangiocarcinoma were retrospectively reviewed. Tumors were of(More)
PURPOSE To evaluate the use of multidetector computed tomographic (CT) esophagography to grade esophageal varices and differentiate between varices at low risk and those at high risk for bleeding, with endoscopy as the reference standard. MATERIALS AND METHODS This study was approved by the institutional review board; all subjects gave informed consent.(More)
OBJECTIVE Our aim was to evaluate the performance of hypertonic saline (HS)-enhanced bipolar radiofrequency ablation using wet-cooled electrodes versus monopolar radiofrequency ablation to create coagulation necrosis in explanted bovine liver. CONCLUSION HS-enhanced bipolar radiofrequency ablation using the wet-cooled electrodes shows better performance(More)
PURPOSE To retrospectively evaluate the diagnostic performance of magnetic resonance (MR) imaging in predicting the appropriateness of liver donation in potential living liver donors by using histopathologic results as the reference standard. MATERIALS AND METHODS This study was approved by institutional review board; all patients gave informed consent(More)
OBJECTIVE To determine whether saline-enhanced dual probe bipolar radiofrequency ablation (RFA) using perfused-cooled electrodes shows better in-vitro efficiency than monopolar or single probe bipolar RFA in creating larger coagulation necrosis. MATERIALS AND METHODS RF was applied to excised bovine livers in both bipolar and monopolar modes using a 200 W(More)
OBJECTIVE To assess the diagnostic value of arterial, pancreatic, and hepatic phase imaging with multidetector-row computed tomography of a bile duct malignancy. METHODS Our institutional review board approved this retrospective study and waived the requirement for informed consent. Forty-two patients with surgically proven hilar or extrahepatic(More)
OBJECTIVE To determine whether hypertonic saline (HS)-mediated bipolar radio-frequency (rf) application as advantages over monopolar simultaneous and alternating rf applications for creating larger areas of coagulation necrosis. MATERIALS AND METHODS A total of 60 rf ablations using double perfused-cooled electrodes and a 200 W generator (CC-3 model,(More)