Endoscopic ultrasound

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  • When in the closed position, the orifice is obscured by the anterior and posterior leaflets. The anterior comprises about one half to two thirds of this area, the posterior comprises about one third to one half of this area. The point of attachment of the anterior leaflet comprises one third of the circumference of the annulus (the fibrous area) and the posterior leaflets comprises two thirds of the circumference of the annulus (the muscular area). The fibrous support of the anterior leaflet is fixed, the muscular support of the posterior leaflet can enlarge and does so when...

    pdf218p wawawawawa 27-07-2012 64 6   Download

  • Ultrasound nowadays is a well established diagnostic and therapeutic tool in diseases within several medical specialities. Furthermore, technical improvement of ultrasound equipment and continuous basic and clinical ultrasound research have increased the use of ultrasound within new fields. In gastroenterology, ultrasound has been used for several decades to perform B-mode imaging of the abdominal organs. However, the development of new techniques, e.g.

    pdf280p echbuon 02-11-2012 20 4   Download

  • Today, computed tomography (CT) is the most commonly used imaging method in the assessment of pancreatic tumors. The sensitivity of CT in detection of pancreatic tumors is more than 90% when direct and indirect signs are used for diagnosis. However, the potential to differentiate exocrine (non-endocrine) tumors of the pancreas is limited. CT is used in these lesions to perform an adequate staging, especially for surgical purposes. The operative resectability, primarily in regard to vessels, lymph node metastasis and hepatic metastasis, has to be assessed....

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  • Evaluation of patients with MALT lymphoma follows the pattern (Table 105-11) for staging a patient with non-Hodgkin's lymphoma. In particular, patients with gastric lymphoma need to have studies performed to document the presence or absence of H. pylori infection. Endoscopic studies including ultrasound can help define the extent of gastric involvement. Most patients with MALT lymphoma have a good prognosis, with a 5-year survival of ~75%. In patients with a low IPI score, the 5-year survival is ~90%, while it drops to ~40% in patients with a high IPI score.

    pdf5p thanhongan 07-12-2010 32 3   Download


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