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Multi-line lasers were applied to the on-line defect detection for steel rails instead of single-line laser,which solved the problem of "pseudo defects" due to the vibration of rails under the mode of single-line laser. Images of multi-line lasers captured by camera were processed to realize the online detection and the accurate defect feature area was acquired with steps of the extraction of strip centers,detection of difference algorithm,discrimination between real and pseudo defects,image mosaic,etc. Images of the defect area were extracted by the cross-correlation and self-correlation information of laser curves,and there was no need for the step of depth mapping under the single-line mode,so the problem of "fault detection" caused by the vibration of rails was solved fundamentally. The technique is applied to on-line detection of defects for the bottom side of steel rails,and the detection rate is much higher than manual detection.

Coronary artery disease (CAD) is a common major disease. Revascularization with percutaneous coronary intervention (PCI) or coronary artery bypass graft (CABG) could relieve symptoms and myocardial ischemia. As the treatment improves and evolves, the number of aged patients with complex diseases and multiple comorbidities gradually increases. Furthermore, in patients with multivessel disease, 3-vessel PCI may lead to a higher risk of complications during the procedure, leading to further ischemia and higher long-term mortality than PCI for one vessel or two vessels. Nevertheless, the risk factors for accurately predicting patient mortality after 3-vessel PCI are unclear. Thus, a new risk prediction model for primary PCI (PPCI) patients’ needs to be established to help physicians and patients make decisions more quickly and accurately. This research aimed to construct a prediction model and find which risk factors will affect mortality in 3-vessel PPCI patients. This nationwide population-based cohort study crossed multiple hospitals and selected 3-vessel PPCI patients from January 2007 to December 2009. Then five different single machine learning methods were applied to select significant predictors and implement ensemble models to predict the mortality rate. Of the 2337 patients who underwent 3-vessel PPCI, a total of 1188 (50.83%) survived and 1149 (49.17%) died. Age, congestive heart failure (CHF), and chronic renal failure (CRF) are mortality’s most important variables. When CRF patients accept 3-vessel PPCI at ages between 68–75, they will possibly have a 94% death rate; Furthermore, this study used the top 15 variables averaged by each machine learning method to make a prediction model, and the ensemble learning model can accurately predict the long-term survival of 3-vessel PPCI patients, the accurate predictions rate achieved in 88.7%. Prediction models can provide helpful information for the clinical physician and enhance clinical decision-making. Furthermore, it can help physicians quickly identify the risk features, design clinical trials, and allocate hospital resources effectively.

Portable magnetic-assisted capsule endoscopy (MACE) provides satisfactory patient experience and safety with comparable performance in diagnosis of organic lesions when compared to conventional upper gastrointestinal endoscopy. In this study, a total of 58 homecare patients were included for MACE either in the hospital (n = 42) or at home (n = 16), with mean age of 71.1 ± 12.4 years. A total of 55 patients (94.83%) had completed the MACE with diagnosis of reflux esophagitis (43.6%), gastritis (54.5%), erosions (21.8%), fundic polyps (14.5%), peptic ulcers (25.9%), etc. Most patients (n = 47, 85.5%) were satisfied with the experience, and all patients who received MACE at home (n = 15, 100%) appreciated the convenience of endoscopy at home. Less than half of the patients (n = 24, 43.6%) could afford MACE if the expense was not covered by health insurance (USD 714). Time consumption from both traffic and capsule manipulation was also challenging for the physicians, as it took an average of 24.7 min to complete MACE, but it added up to a total of 92.7 min at home, which is about 15 times that of conventional endoscopy in hospital. More efforts are needed to ease the financial burden of patients, and optimization of workflow in community practice may help lift the obstacles revealed in this study.

Screening colonoscopy is one of the most effective methods to detect and prevent colorectal cancer by removing neoplastic polyps. The recent discovery of serrated polyps with neoplastic potential has reclassified these polyps into hyperplastic polyps (HPs), sessile serrated adenoma (SSA), and traditional serrated adenoma (TSA) on the basis of macroscopic morphology and microscopic histology. In this study, we aimed to revisit HPs identified during screening endoscopy by histological reevaluation and genetic alterations. Methods: A total of 253 HPs found by screening endoscopy were rechecked by two pathologists, and mutual agreement on the diagnosis of polyps was subjected for further statistical analysis. Direct sequencing for gene mutation at BRAF V600E and KRAS G12D was performed. Results: Among the 253 HPs analyzed, 175 were classified as serrated polyps, while 78 were reclassified into other diagnosis. The concordance among pathologists in diagnosing these serrated polyps was substantial (κ = 0.6672). About 11.5% of the reviewed HPs turned out to be with neoplastic potential, including 7 SSAs, 5 TSAs, as well as 17 conventional adenomas. Results of subgroup analyses revealed that polyps >10 mm were more likely to be found in proximal colon (p = 0.0006) and tended to harbor neoplastic components. We found that two SSAs and one TSA had BRAF mutation, while one TSA had KRAS mutation. The mean size of these mutated adenomas (9.0 mm) was larger than those with wild-type genes (4.9 mm). Conclusion: Serrated polyps with neoplastic potential were prone to be overlooked as hyperplastic and innocent ones during screening colonoscopy. Therefore, both endoscopists and pathologists should pay attention to understand the importance of recognizing serrated adenomas, especially for those polyps >10 mm, or those that are located in the proximal colon.

A 47-year-old man with chronic hepatitis B had progressive elevated oc-fetoprotein of 2 years' duration. A pancreatic tail tumor, instead of liver tumor, was detected. He underwent elective distal pancreatectomy and splenectomy and the pathology turned out to be acinar cell carcinoma of the pancreas. Serum level of oc-fetoprotein returned to normal soon after surgery. No cancer recurrence was noted after 3 years of follow-up. Alpha-fetoprotein is commonly used as a tumor marker to screen for hepatocellular carcinoma in high-risk patients. However, elevated oc-fetoprotein could occur in a much rarer disease, acinar cell carcinoma of the pancreas.

Introduction: The oral glucose tolerance test (OGTT) is widely used as a diagnostic tool for impaired glucose tolerance (IGT) in clinical settings and animal experiments. The area under the curve (AUC) is then developed to quantify the total increase in blood glucose during the OGTT. Similarly, attenuation of the increased AUC indicates the improvement of IGT in animals. Variations in fasting plasma glucose between individuals stimulate the development of incremental area under the curve (iAUC). However, the iAUC determined from subtracting the baseline value of fasting plasma glucose (similar to ΔAUC) has been challenged as problematic without evidence.Material and methods: We developed four different diabetic animal models. In each model, rats were treated with metformin, dapagliflozin, and insulin respectively for 1 week. OGTTs were performed after 7 days of the drug treatment. The acute blood glucose changes induced by one-time treatment of drugs were also compared.Results: After a daily application of each drug at an effective dose for 7 days, results indicated potency in the following order: insulin > dapagliflozin > metformin. This was determined by calculation using the AUC in all diabetic models. However, the order changed when using the calculation with iAUC. Additionally, signals were changed before the OGTT in each model that received repeated treatment of each drug. Notably, drug potency was shown to be the same in OGTT calculated from iAUC and AUC in diabetic rats receiving acute treatment.Conclusions: iAUC seems unsuitable for application in cases where subjects are receiving chronic medication(s). [ABSTRACT FROM AUTHOR]

Abstract Pancreatic fluid collections (PFCs) including pancreatic pseudocyst (PP) and walled-off necrosis (WON) are complications after acute pancreatitis. We aimed to evaluate the efficacy and safety of endoscopic ultrasound (EUS)-guided lumen-apposing metal stent (LAMS) placement to manage PFCs. Between June 2019 and May 2023, patients with symptomatic PFCs who underwent EUS-guided electrocautery-enhanced LAMS drainage were enrolled retrospectively from eight tertiary centers in Taiwan. In total, 33 [14 (42.42%) PP and 19 (57.58%) WON] patients were enrolled. Gallstones (27.27%) and abdominal pain (72.73%) were the most common etiology and indication for drainage. The technical and clinical success rates were 100% and 96.97%, respectively, and the mean procedure time was 30.55 (± 16.17) min. Complications included one (3.03%) case of self-limited bleeding; there were no cases of mortality. Seven (21.21%) patients had recurrence. Patients with disconnected pancreatic duct syndrome (DPDS) had a higher recurrence rate than those without (71.43% vs. 38.46%, p = 0.05). After replacing LAMSs with transmural double-pigtail plastic stents (DPSs) in the DPDS patients, the DPS migration rate was higher in the patients with recurrence (100% vs. 33.33%, p = 0.04). In conclusion, drainage of symptomatic PFCs with EUS-guided electrocautery-enhanced LAMS appears to be efficient and safe. Replacing LAMSs with DPSs in DPDS patients was associated with a lower recurrence rate.

Abstract Background and Aim Vonoprazan as a new acid blocker has more potency and longer lasting acid suppression than proton pump inhibitors. Whether the efficacy of vonoprazan‐based triple therapy is comparable with or even better than that of currently recommended first‐line therapies is still unknown. Our study aims to compare the eradication rate and major adverse effects between 7‐day vonoprazan‐based triple therapy with high‐dose amoxicillin and 14‐day extended sequential therapy. Methods We performed a retrospective analysis from the database of 13C‐urea breath test at Fu Jen Catholic University Hospital. All patients with a definite diagnosis of Helicobacter pylori infection by rapid urease test, urea breath test, stool antigen test, or pathology report were recruited. Patients receiving first‐line regimens with vonoprazan‐based triple therapy or extended sequential therapy were included. The respective eradication rate determined by 13C‐urea breath test and major adverse effects were demonstrated. Results Totally, 106 patients were recruited in the vonoprazan‐based triple therapy group and 357 in the extended sequential therapy group. There was no significant difference in eradication rate between vonoprazan‐based triple therapy with high‐dose amoxicillin and extended sequential therapy (83.0 vs 88.8%, P = 0.12). Major adverse effects occurred in 13 of the extended sequential therapy group but none in the other group (0% vs 3.6%, P = 0.046). Conclusions Seven‐day vonoprazan‐based triple therapy with high‐dose amoxicillin is a potential first‐line anti‐Helicobacter pylori regimen alternative to current standard treatment, with the advantages of simplicity, short treatment duration, low pill burden, and fewer major adverse effects.

A letter to the editor is presented about the different intervals of endoscopic variceal ligation.