Bibliografias temáticas / Cholangio-MRI

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Literatura científica selecionada sobre o tema "Cholangio-MRI"

Autor: Grafiati

Publicado: 5 de abril de 2025

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Artigos de revistas sobre o assunto "Cholangio-MRI"

van der Voort, Ivo R., Ioannis S. Papanikolaou, Sascha S. Chopra, Jens Rump, Christian J. Seebauer, Florian Wichlas, Daniel C. Baumgart, Bertram Wiedenmann, Ulf Teichgraeber e Thomas Rosch. "T1180 MRI-Guided Percutaneous Transheptic Cholangio Drainage (MRI-PTCD): Feasibility Study Using a Pig Model". Gastroenterology 136, n.º 5 (maio de 2009): A—517. http://dx.doi.org/10.1016/s0016-5085(09)62379-9.

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Kumar, Vipan, Niraj Gupta, Mohd Muzammil Ambekar, Neeraj Sharma, Prateek Sood, Vikrant Sharma, Narvir Singh Chauhan, Rajkumar Sharma e Somraj Mahajan. "Agenesis of dorsal pancreas causing extra hepatic portal vein obstruction in a patient of symptomatic cholelithiasis: a case report". International Surgery Journal 5, n.º 7 (25 de junho de 2018): 2682. http://dx.doi.org/10.18203/2349-2902.isj20182799.

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Agenesis of dorsal pancreas (ADP) is an extremely rare entity. We report a case of 50 year old lady with complete agenesis of the dorsal pancreas presenting with extra-hepatic portal vein obstruction (EHPVO) with symptomatic gall stone disease. Contrast enhanced computed tomography (CECT) revealed a normal pancreatic head, but pancreatic body and tail were not visualized, pancreatic head was compressing upon the portal vein with marked luminal narrowing and cavernoma formation. Magnetic resonance imaging (MRI) and magnetic resonance cholangio pancreatography (MRCP) findings confirmed the CT findings of ADP.

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Karki, S., KS Joshi, S. Regmi, RB Gurung e B. Malla. "Role of Ultrasound as Compared with ERCP in Patient With Obstructive Jaundice". Kathmandu University Medical Journal 11, n.º 3 (3 de maio de 2015): 237–40. http://dx.doi.org/10.3126/kumj.v11i3.12512.

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Background The diagnosis of obstructive jaundice relies on proper history taking, clinical examination, laboratory investigations and different non invasive imaging modalities like Ultrasonography (USG), Cholangio Computed Tomography (CCT), Magnetic resonance Imaging (MRI) with Magnetic Resonance Cholangio Pancreatography (MRCP) and invasive modalities like endoscopic retrograde cholangiography (ERCP) and percutaneous trans hepatic cholangiography (PTC). Objective To compare the role of ultrasound with endoscopic retrograde cholangiography and to determine the major causes of obstructive jaundice in our prospect. Methods This was a prospective, analytical study conducted on 88 patients presenting to Department of Radiodiagnosis and Imaging at Dhulikhel Hospital-Kathmandu University hospital from March 2011 to August 2012 with clinical diagnosis of obstructive jaundice. Sonographic evaluation was performed in Siemens acusion x-150 and x-300. The final diagnosis was made by endoscopic retrograde cholangiography and /or surgery and confirmed histopathologically. Results The most common benign causes of obstructive jaundice were choledocholithiasis (63%), CBD stricture (12.3%), cholangitis (8%) and pancreatitis (6.85%) whereas cholangio carcinoma (6.85%) and carcinoma head of pancreas (4%) comprised of the malignant causes . Ultrasonography had sensitivity of 100% and specificity of 89% in detecting choledocholithiasis. It was found to be 98.78% sensitive and 83.33% specific in cholangiocarcinoma. Similarly in pancreatitis, the sensitivity of ultrasonography was 97.59% and sensitivity was 66.67%. Conclusion Ultrasonography acts as a valuable diagnostic imaging modality in detecting the causes of obstructive jaundice. Due to its easy availability, non invasive nature and cost effectiveness, it can be considered as the first line imaging technique/ tool. ERCP is the invasive imaging tool and can be used for both diagnostic and therapeutic purpose. DOI: http://dx.doi.org/10.3126/kumj.v11i3.12512 Kathmandu Univ Med J 2013; 43(3):237-240

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Krimou, Hicham, Samir Hasbi, Nizar Errabi, Mohammed Cisse, Mohammed Laaroussi, Abdessamad El Kaoukabi, Belhamidi Said, Mohammed Menfaa, Fouad Sakit e Abdelkarim Choho. "Gallbladder Agenesis Discovered Intraoperatively: About a Case". Scholars Journal of Medical Case Reports 12, n.º 08 (19 de agosto de 2024): 1425–27. http://dx.doi.org/10.36347/sjmcr.2024.v12i08.019.

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Gallbladder agenesis is a rare, little-recognized congenital anomaly, presenting in the form of hepatic colic in 23% of patients. The ultrasound assessment often describes a scleroatrophic vesicle, which can lead to unnecessary and potentially dangerous surgery. We report the case of a 64-year-old man, with no history of cholecystitis, presenting with hepatic colic and whose ultrasound diagnosis of scleroatrophic vesicle was questioned. patient was operated on by the traditional route for gallbladder lithiasis. The absence of a gallbladder was discovered intraoperatively. In order to confirm the diagnosis postoperatively, we performed magnetic resonance imaging (cholangio-MRI) which made the diagnosis of agenesis of the gallbladder.

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NE, Khabiz. "Agenesis of the Gallbladder: About A Case". Gastroenterology & Hepatology International Journal 4, n.º 1 (1 de fevereiro de 2022): 1–4. http://dx.doi.org/10.23880/ghij-16000148.

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The agenesis of the gallbladder is a rare, unsung congenital anomaly, presenting itself in different clinical forms. The ultrasound balance sheet often describes a lichen-atrophic vesicle, which can lead to unnecessary and potentially dangerous surgery. We report the case of a 45-year-old patient with no history of Cholecystitis, with cholestasis jaundice and whose ultrasound diagnosis of lichen-atrophic vesicle was questioned. Magnetic resonance imaging (Cholangio-MRI) has led to the diagnosis of gallbladder agenesis. No hepatic or pancreatic abnormalities, the GB couldn’t be found in its normal site, or in an ectopic place. Endoscopic retrogradeCholangio-Pancreatography with sphincterotomy was done to extract the GB stones and to confirm the diagnosis GB agenesis. The evolution has been marked by the improvement of jaundice and the stabilization of laboratory findings.

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Vila, Juan J., F. Javier Jiménez Mendioroz, Paul Yeaton, Iñaki Fernández-Urién, José Luis García Sanchotena, Silvia Goñi, Marta Gómez Alonso et al. "EUS is superior to secretin-enhanced cholangio-MRI to establish the etiology of idiopathic acute pancreatitis". Endoscopy International Open 08, n.º 10 (outubro de 2020): E1441—E1447. http://dx.doi.org/10.1055/a-1233-1849.

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Abstract Background and study aims The etiology of idiopathic acute pancreatitis (IAP) should always be defined. Our aim was to compare the diagnostic value of endoscopic ultrasound (EUS) versus secretin-enhanced magnetic resonance cholangiopancreatography (S-MRCP) in patients with IAP. Patients and Methods Patients admitted to a single tertiary care University hospital with IAP were invited to participate in the study. Enrolled patients underwent EUS and S-MRCP in a single-blinded comparative study. EUS and S-MRCP were performed no sooner than 4 weeks after discharge. The diagnostic yield of EUS and S-MRCP and demographic variables were included in the analysis. Additional follow-up, results of subsequent serology, radiographic exams, and relevant histological analysis were considered in determination of the final diagnosis. Results A total of 34 patients were enrolled; EUS was normal in six, cholelithiasis was defined in 15, choledocholithiasis in two, pancreas divisum in three, branch-type intraductal papillary mucinous tumor (IPMT) in three, and chronic pancreatitis in five. S-MRCP identified choledocholithiasis in one, divisum in four, branch-type IPMT in three, chronic pancreatitis in two; 24 subjects diagnosed as normal by S-MRCP. Diagnostic correlation between EUS and S-MRCP was slight (kappa = 0.236, 95 % confidence interval: 0.055–0.416). EUS provided a statistically significantly higher diagnostic yield than S-MRCP: 79.4 % (CI95 %: 65 %–94 %) vs 29.4 % (CI95 %: 13 %–46 %) (P = 0.0002). The sensitivity, specificity, and positive and negative predictive values of EUS and S-MRCP were 90 %, 80 %, 96 %, 57 % and 33 %, 100 %, 100 % and 16 %, respectively. Conclusion The diagnostic yield of EUS is higher than S-MRCP in patients with IAP.

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LOGESWARAN, RAJASVARAN. "SCALE-SPACE SEGMENT GROWING FOR HIERARCHICAL DETECTION OF BILIARY TREE STRUCTURE". International Journal of Wavelets, Multiresolution and Information Processing 03, n.º 01 (março de 2005): 125–40. http://dx.doi.org/10.1142/s0219691305000750.

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Liver diseases are a common medical problem, especially amongst the population of developing countries. Magnetic Resonance Cholangio Pancreatography (MRCP) has become the popular non-invasive, non-ionizing examination for analysis of the hepatobiliary structure in the liver. Unfortunately, conventional 2D MRCP images can be difficult to analyze for biliary tree anomalies, especially with volume effect, artefacts and noise present in these images, whilst good 3D MRI systems are costly for less affluent nations. This paper proposes a scale-space multi-resolution approach to a segment-based implementation of the popular region growing algorithm, to identify the hierarchical structure of the biliary tree in conventional 2D MRCP images. Results obtained are promising in aiding automatic processing of these images to assist medical practitioners in analyzing the biliary tract more efficiently. Application of the algorithm may be extended for telemedicine.

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Petracchi, Enrique, Pablo Merchán del Hierro, Lucia Rocco e Carlos Canullan. "Reporte de Caso Clínico: Migración de cálculo dificultoso". Revista Médica del Hospital José Carrasco Arteaga 13, n.º 1 (15 de setembro de 2021): 66–69. http://dx.doi.org/10.14410/2021.13.1.cc.11.

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BACKGROUND: Common bile duct lithiasis is a pathology with a high rate of migration of small stones to the duodenum. However, asymptomatic migration of stones larger than 1cm (macrolithiasis) is atypical. We present a case of migration of a macrocalculus located in the middle of the common bile duct. CASE REPORTS: We present the case of a 27-years-old man, who consulted for postprandial epigastric pain, that started 4 months ago. Abdominal ultrasound showed biliary sludge and common bile duct macrocalculus, with Cholangio-MRI the diagnosis was confirmed. A laparoscopic cholecystectomy with intraoperative cholangiography was performed. EVOLUTION: During the laparoscopic cholecystectomy, no stones were evidenced in the intraoperative cholangiograpy. Due to the disagreement between the preoperative IOC images, transcystic instrumentation with a Dormia basket was performed, without stone extraction. The patient had a favorably evolution, without complications due to the stone migration. Postoperative MRC was performed, without evidence of endoluminal images in the bile duct. CONCLUSIONS: Biliary pathology is dynamic, with the possibility of gallstone migration, even for large gallstones and complicated cases. Although ultrasound and MRI have high sensitivy for diagnosis; IOC is essential to diagnose and treat lithiasic pathology, resolving it in a single operating time, avoiding multiple procedures.

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Гудилина, E. Gudilina, Вишленкова, E. Vishlenkova, Лепэдату, P. Lepedatu, Синюкова et al. "Charactecteristics of Liver Tumors by means of ARFI-elastography". Journal of New Medical Technologies 21, n.º 4 (8 de outubro de 2014): 86–92. http://dx.doi.org/10.12737/7276.

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The purpose of this study was to determine the possibility of ARFI- elastography for diagnosis of tumors of the liver. The study included 95 patients with liver tumors. 22 patients were excluded from the study because of the deep location of the formation or the inability to measure the speed performance. Therefore the tumors in 73 patients were obtained by ARFI-elastography and analyzed. Verification of the diagnosis was achieved by histological examination of the material in 93% of cases and by MRI, CT in 7% of cases. Patients were divided by diagnosis: 4 – with benign tumors, 33 – with hepatocellular carcinoma, 4 – with cholangio-carcinoma, 19 – with metastatic colorectal cancer, 13 – with metastases of other cancer. Benign tumors included two focal nodular hyperplasia and hepatocellular adenoma, one cavernous hemangioma a large size. The obtained results were compared with normal liver parenchyma in 77 people. Average speed was: 2.83 m/s in the benign, 1.55 m/s in the normal liver parenchyma, 2.5 m/s at the nodes of hepatocellular carcinoma, 2.66 m/s at the nodes cholangio-carcinomar, 2.79 m/s in the metastasis of colorectal cancer, 2.79 m/s in the remaining metastases. Associated threshold value for the diagnosis of the majority of malignant tumors, it is necessary to consider the speed of over 2 m/s. Sensitivity groups ranged from 59% to 100% and a specificity of 70% to 86%. The results indicate higher speed performance parameters (mean, median, threshold values > 2.3 m/s) in benign tumors. This is due to a small group, as well as the large size of entities – from 5.0 to 24.0 cm, indicating that the long-term course of the disease with the development of fibrosis in them, so the stiffness of education becomes higher. These data prove that the quantitative elastography shear wave can be used as an additional diagnostic tool in oncology, but further accumulation of scientific data, since the values of the groups overlap.

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Manetti, Natalia, Clara Faini, Francesca Bucciero, Giulia Razzolini, Maria Marsico, Maria Rosa Biagini e Stefano Milani. "Main-duct intraductal papillary mucinous neoplasm of the pancreas: a case report". Clinical Management Issues 6, n.º 4 (15 de dezembro de 2012): 127–34. http://dx.doi.org/10.7175/cmi.v6i4.475.

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Three distinct entities among non-inflammatory cystic lesions of the pancreas have been defined: intraductal papillary mucinous neoplasm (IPMN), serous cystic neoplasm (SCN) and mucinous cystic neoplasm (MCN). IPMN is characterized by intraductal papillary growth and thick mucus secretion: its incidence has dramatically increased since its initial description. These lesions probably can progress towards invasive carcinoma. IPMNs are symptomatic in most cases: the typical presentation is a recurrent acute pancreatitis, without evident cause, of low or moderate severity. The diagnosis is usually based upon the imaging (CT/cholangio-MRI) demonstrating a pancreatic cystic mass, involving a dilated main duct, eventually associated to some filling defects, or a normal Wirsung duct communicating with the cyst lesion. Surgical treatment is generally indicated for main duct IPMN and branch duct IPMN with suspected malignancy (tumour size ≥ 30 mm, mural nodules, dilated main pancreatic duct, or positive cytology) or prominent symptoms. Herein we present a case of IPMN of the main duct which occurred with abdominal and back pain associated with weight loss. After the diagnosis, she successfully underwent surgery and is now in a follow-up program.

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Mais fontes

Teses / dissertações sobre o assunto "Cholangio-MRI"

Essamlali, Abdelhadi. "Reconstruction 3D des voies biliaires pour l’amélioration de la CholangioPancréatographie Rétrograde par voie Endoscopique (CPRE)". Electronic Thesis or Diss., Compiègne, 2024. http://www.theses.fr/2024COMP2841.

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Cette thèse aborde la problématique de l'amélioration de la CholangioPancréatographie Rétrograde par voie Endoscopique (CPRE), en proposant une méthode avancée de segmentation et de reconstruction 3D des voies biliaires. Les techniques actuelles de la CPRE présentent des limites importantes, notamment en raison de la difficulté de la visualisation des voies biliaires à partir des images 2D, ce qui peut entraîner des erreurs de planification et des complications durant les interventions. La reconstruction 3D des voies biliaires, à partir des images de cholangio-IRM, apparaît comme une solution prometteuse pour surmonter ces difficultés. La thèse propose une nouvelle approche de segmentation automatique BDU-Net, à base du réseau U-Net, spécifiquement adaptée aux caractéristiques des images de cholangio-IRM. Les performances du BDU-Net ont été comparées avec celles de réseaux de segmentation de références, tels que V-Net et U-Net++, en utilisant des métriques quantitatives comme le score de Dice et la distance de Hausdorff, ainsi qu'une évaluation qualitative réalisée par des experts. Les résultats montrent une amélioration de la précision des reconstructions 3D grâce à BDU-Net. Cette thèse explore également l'impact des différentes méthodes de prétraitement des images de cholangio-IRM, incluant l'utilisation du recadrage dynamique, pour améliorer la qualité de segmentation. Ce prétraitement permet de mieux visualiser les structures biliaires, et d'améliorer la reconstruction 3D des voies biliaires, particulièrement dans les cas complexes. En plus des contributions en segmentation, cette thèse propose un plugin, nommé CPRE Pro, développé pour la plateforme 3DSlicer. Cet outil permet d'intégrer les reconstructions 3D dans le workflow clinique, facilitant la planification de la CPRE. Grâce à une interface intuitive, les cliniciens peuvent interagir avec les images de cholangio-IRM, effectuer des segmentations automatiques et visualiser l'anatomie biliaire en 3D
This thesis addresses the challenge of improving Endoscopic Retrograde Cholangiopancreatography (ERCP) by proposing an advanced method for 3D reconstruction of bile ducts. Current ERCP techniques face significant limitations, mainly due to the difficulty of visualizing bile ducts using 2D images, which can lead to planning errors and complications during interventions. The use of 3D reconstruction of bile ducts from MR cholangiography (MRCP) images presents a promising solution to overcome these challenges. The thesis introduces a novel approach for automatic segmentation called BDU-Net, based on the U-Net architecture and specifically tailored to MRCP images. The performance of BDU-Net was compared with other reference segmentation models, such as V-Net and U-Net++, using quantitative metrics like the Dice score and Hausdorff distance, as well as a qualitative assessment by experts. The results show a significant improvement in the accuracy of 3D reconstructions with BDU-Net. Additionally, the thesis explores the impact of various preprocessing methods for MRCP images, including dynamic cropping, to enhance the segmentation quality. This preprocessing step improves the visualization of bile duct structures and enhances 3D reconstruction, especially in complex cases. Beyond segmentation contributions, the thesis also presents a plugin called CPRE Pro, developed for the 3DSlicer platform. This tool integrates 3D reconstructions into the clinical workflow, facilitating ERCP planning. With an intuitive interface, clinicians can interact with MRCP images, perform automatic segmentations, and visualize bile duct anatomy in 3D, thus improving clinical decision-making and intervention planning

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Trabalhos de conferências sobre o assunto "Cholangio-MRI"

North, Oliver J., Mihailo Ristic, Christopher A. Wadsworth, Ian R. Young e Simon D. Taylor-Robinson. "Design and evaluation of endoscope remote actuator for MRI-guided Endoscopic Retrograde Cholangio-Pancreatography (ERCP)". In 2012 4th IEEE RAS & EMBS International Conference on Biomedical Robotics and Biomechatronics (BioRob 2012). IEEE, 2012. http://dx.doi.org/10.1109/biorob.2012.6290270.

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Essamlali, A., A. Becq, Dm Camus, L. Arrivé, M. Chartier, G. Salin, J. Szewczyk e I. Claude. "BDU-Net: A New Application of U-Net to the Segmentation of Bile Ducts from Cholangio-MRI Images". In 2024 IEEE 37th International Symposium on Computer-Based Medical Systems (CBMS). IEEE, 2024. http://dx.doi.org/10.1109/cbms61543.2024.00094.

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