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This paper develops a practical design method for implementing Tomlinson–Harashima precoding (THP) in a downlink channel with multiple antennas at the transmitter and a single antenna at each receiver. A two-step design process is proposed for minimizing the total transmit power while satisfying every user’s minimum data rate and maximum bit-error rate(More)
We designed this experimental study to determine the optimal cycle for intermittent inflow occlusion during liver resection. A cycle of intermittent clamping (IC) for 15 minutes of ischemia followed by reperfusion for 5 minutes during liver resection is currently the most popular protocol used by experienced liver centers. As each period of reperfusion is(More)
BACKGROUND Inflammatory pseudotumor (IPT) of the liver is a benign condition with a good prognosis. However, it is difficult to distinguish clinical and radiological findings of IPT from those of malignancies. The aims of this study are to determine the clinical, radiological, and pathological characteristics, particularly relating to the role of the(More)
Prediction of malignancy or invasiveness of branch duct type intraductal papillary mucinous neoplasm (Br-IPMN) is difficult, and proper treatment strategy has not been well established. The authors investigated the characteristics of Br-IPMN and explored its malignancy or invasiveness predicting factors to suggest a scoring formula for predicting pathologic(More)
BACKGROUND/AIMS Early recurrence (ER) after liver resection is one of the most important factors impacting the prognosis and survival of patients with hepatocellular carcinoma (HCC). This study aimed to identify the factors associated with ER after curative hepatic resection for HCC. METHODS From the July 2000 to July 2006, 144 patients underwent hepatic(More)
We reviewed the results of 339 consecutive appendectomies, including perforated appendicitis, to assess the advantages of the laparoscopic approach for acute appendicitis. Three hundred and eighty-eight patients underwent appendectomy at the Keimyung University Kyungju Dongsan Hospital between March 1994 and June 1996; 339 patients were treated using(More)
Living-donor liver transplant for a big hepatocellular carcinoma located in the caudate lobe is challenging owing to dissemination of cancer cells during recipient hepatectomy. We report a case of living-donor liver transplant using the right side of the liver of a living donor combined with inferior vena cava interposition graft after en bloc resection of(More)
BACKGROUND Systematic segmentectomy is useful in treating small hepatocellular carcinoma in the cirrhotic liver. However, accomplishment of an exact systematic segmentectomy still remains a challenging procedure because of the variable anatomy of portal branches. We evaluated the usefulness of the dye injection method for systematic segmentectomy, which(More)
A 25-year-old Uzbek male presented with right upper abdominal pain for 20 days. On radiologic studies, a huge cystic mass was noticed in the right liver which was suspected as parasitic. The patient received right hepatic segmentectomy (segment 7), and the surgically resected mass was confirmed as cystic echinococcosis (CE), measuring 10.5 cm in its(More)
The standard laparoscopic cholecystectomy usually requires four trocars: two 10-mm and two 5-mm trocars. With the development of mini-instruments, laparoscopic surgeons have developed the two- or three-port techniques. The selection of the number and size of trocars depends on the surgeon's experience and preferences. Removal of the gallbladder is critical(More)