Christos N. Liatsos

Learn More
This paper evaluates the performance of an automatic method for structural decomposition, noise removal and enhancement of bowel sounds (BS), based on the wavelet transform. The proposed method combines multiresolution analysis with hard thresholding to compose a wavelet transform-based stationary-nonstationary (WTST-NST) filter, for enhanced separation of(More)
BACKGROUND The aim of this prospective study was to evaluate and compare the efficacy and safety of two different precutting techniques in the treatment of 103 consecutive patients with choledocholithiasis. METHODS The patients were randomized into two groups. The first group included 74 patients who underwent needle-knife fistulotomy avoiding the(More)
Wireless capsule endoscopy (WCE) is a revolutionary, patient-friendly imaging technique that enables non-invasive visual inspection of the patient’s digestive tract and, especially, small intestine. However, reviewing the endoscopic data is time consuming and requires intense labor of highly experienced physicians. These limitations were the motive to(More)
OBJECTIVE Although various endoscopic techniques have been proved effective in treating post-cholecystectomy biliary leaks, the choice of the best method remains controversial. The aim of this prospective study was to compare the efficacy and safety of biliary stenting alone with biliary stenting plus sphincterotomy for the treatment of post-cholecystectomy(More)
Wireless capsule endoscopy (WCE) is a novel imaging technique that is gradually gaining ground as it enables the non-invasive and efficacious visualization of the digestive track, and especially the entire small bowel including its middle part. However, the task of reviewing the vast amount of images produced by a WCE examination is a burden for the(More)
INTRODUCTION Despite undergoing standard endoscopic diagnostic evaluation with eosophagogastroduodenoscopy and ileocolonoscopy, up to 30% of patients with iron deficiency anemia (IDA) have no definitive diagnosis. The aim of this study was to prospectively investigate the role of wireless capsule endoscopy (WCE) in detecting lesions of the small bowel in(More)
BACKGROUND The role of capsule endoscopy (CE) in the diagnosis of active mild-to-moderate GI bleeding (GIB) immediately after a negative EGD and ileocolonoscopy has not been prospectively evaluated. OBJECTIVE To estimate the diagnostic yield and clinical significance of CE in patients with acute, obscure, overt, mild-to-moderate GIB. DESIGN A(More)
BACKGROUND To date it is not known whether gastric juice vitamin C levels are influenced by Helicobacter pylori CagA(+) strains. The aim of the present study, therefore, was to study the impact of H. pylori CagA status on gastric juice vitamin C levels. MATERIALS AND METHODS We studied 30 H. pylori(+) patients, and the results were compared with 10(More)
A frequent complication in patients with end-stage liver disease is portal vein thrombosis (PVT). Although PVT is not considered an absolute contraindication to orthotopic liver transplantation (OLT), more complex surgery is required and patients have more postoperative complications and greater mortality rates. We describe 2 patients who experienced(More)
Duodenal duplication cysts are rare congenital abnormalities that are most commonly diagnosed in infancy and childhood. However, in rare cases, the lesion can remain asymptomatic until adulthood. An extremely rare case of a previously healthy adult patient with recurrent acute pancreatitis, who was diagnosed with a duodenal duplication cyst is presented. At(More)