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Endoscopic ultrasound (EUS) or echo-endoscopy is a medical procedure in which endoscopy (insertion of a probe into a hollow organ) is combined with ultrasound to obtain images of the internal organs in the chest, abdomen and colon. It can be used to visualize the walls of these organs, or to look at adjacent structures.
Abdominal ultrasound can be used to diagnose abnormalities in various internal organs, such as the kidneys, [1] liver, gallbladder, pancreas, spleen and abdominal aorta.If Doppler ultrasonography is added, the blood flow inside blood vessels can be evaluated as well (for example, to look for renal artery stenosis).
Ultrasound image showing the liver, gallbladder and common bile duct. Medical ultrasound uses high frequency broadband sound waves in the megahertz range that are reflected by tissue to varying degrees to produce (up to 3D) images. This is commonly associated with imaging the fetus in pregnant women. Uses of ultrasound are much broader, however.
It is believed [by whom?] that the concept of moving an optical fiber to produce 2D images with confocal sectioning and laser illumination was first proposed for endoscopic applications by Giniunas et al., in 1993. A major advancement of the SFE is rapid scanning and generation of high-quality images using an amplitude-modulated resonating fiber.
Medical ultrasound includes diagnostic techniques (mainly imaging techniques) using ultrasound, as well as therapeutic applications of ultrasound. In diagnosis, it is used to create an image of internal body structures such as tendons, muscles, joints, blood vessels, and internal organs, to measure some characteristics (e.g., distances and velocities) or to generate an informative audible sound.
Therapeutic endoscopy is the medical term for an endoscopic procedure during which treatment is carried out via the endoscope. This contrasts with diagnostic endoscopy , where the aim of the procedure is purely to visualize a part of the gastrointestinal , respiratory or urinary tract in order to aid diagnosis .
The chart below is older (2020 data) and breaks down the voluntary spending further by separating out-of-pocket payments. In this chart the items are stacked by color. There are a few other countries than just OECD countries. [2] [3] Click to enlarge. Timeline of a few OECD countries: Health care cost as percent of GDP (total economy of a ...
The words esophagogastroduodenoscopy (EGD; American English) and oesophagogastroduodenoscopy (OGD; British English; see spelling differences) are pronounced / ɪ ˌ s ɒ f ə ɡ oʊ ˌ ɡ æ s t r oʊ ˌ d (j) uː oʊ d ɪ ˈ n ɒ s k ə p i /.