ground glass meaning
Definition Ground-glass opacity (GGO) appears at thin-section CT (TSCT) as hazy increased opacity of the lung, with the preservation of bronchial and vascular margins. AE: Acute exacerbation ARDS: Acute respiratory distress syndrome AUC: Area under the ROC curve CO-Hb: Carboxyhemoglobin CT-ILD: Connective tissue disease-associated ILD ELISA: Enzyme-linked immunosorbent assay Fi[O.sub.2]: Fraction of inspiratory oxygen GGO: The first patient had bilateral intestinal infiltrates and the second patient had bilateral subpleural reticulation with scattered areas of, A 37-year-old woman was referred to our institution for multiple bilateral. Lung nodules are common and may be detected on a chest X-ray. Popular belief for many centuries is that ground-up glass (i.e., glass broken into tiny fragments) can kill if swallowed. (Pencil writing on ground glass is largely inert, rub-proof and waterproof, but can be easily erased.). On both x-ray and CT, this appears more grey or hazy as opposed to the normally dark-appearing lungs. Define ground glass. Usually adenocarcinoma of the lung. Due to infection or another chronic interstitial disease, you may develop a hazy area of increased attenuation in your lung. Patients with early diffuse pulmonary infiltrative diseases are more likely to present with an area of ground glass opacity in the lung. 1 glass that has a rough surface produced by grinding, used for diffusing light 2 glass in the form of fine particles produced by grinding, used as an abrasive English Collins Dictionary - English Definition & Thesaurus ground All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only. This hides unsightly details of the lamp and fixture without blocking its light, yielding a softer illumination without giving hard shadows. The present retrospective study aimed to test the validity of a multistep approach to discriminate malignant from benign localised (focal) GGOs, identifies useful diagnostic features on computed tomography (CT), and suggests appropriate management guidelines. Definition of ground glass. 2. ground glass. It usually has preserved vascular and bronchial markings as well, and may well be the result of an acute alveolar disease. Ground glasses commonly serve as a framing reference for a desired aspect ratio. Video shows what ground glass means. Ground glass is an appearance on a CT of a cluster of lung cells that have changed. Glass flasks, stoppers, valves, funnels, and tubing are often connected together by ground glass joints, matching pairs of conical or spherical surfaces that have been ground to a precise shape. The photographer focuses and composes using this projected image, sometimes with the aid of a magnifying glass (or loupe). Flasks and test tubes often have a small ground-glass label area on the side. Most lung nodules are noncancerous, but some may represent early-stage lung cancer. Ground glass opacities [are] a pattern that can be seen when the lungs are sick. Ground glass definition, glass that has had its polished surface removed by fine grinding and that is used to diffuse light. Ground-glass opacities are abnormal findings on a CT scan of the lungs. 1. glass that diffuses light due to a rough surface produced by abrasion or etching 2. particulate glass made by grinding and used as an abrasive Familiarity information: GROUND GLASS used as a noun is rare. Hales notes that a ground glass opacity is a radiologist's characterization of how something may look on the scan. In photography, a sheet of ground glass is used for the manual focusing in some still and movie cameras; the ground-glass viewer is inserted in the back of the camera, and the lens opened to its widest aperture. No signs of clubbing, vasculitis or heart failure were identified. Connect by text or video with a U.S. board-certified doctor now — wait time is less than 1 minute! A ground glass lung result from a CT scan is a non-specific finding that describes an area characterized by a small increase in lung density, explains the National Institutes of Health. Its functions include reducing glare and preventing retinal damage by direct sight of the lamp filament. n. 1. Causes of ground glass opacity in lung. Focal pulmonary ground-glass opacities (GGOs) can be associated with bronchioloalveolar carcinoma. The ground glass usually contains precise markings to show the camera operator the boundaries of the frame or the center reticle, or any other important information. Ground-glass opacity is defined as increased pulmonary opacity without obscuration of underlying bronchial and vascular margins (as opposed to consolidation, which obscures visualization of these structures). [1][2], The Guy de Maupassant short story "La Confession" concerns a jealous girl who poisons her older sister's suitor by inserting ground-up glass into cake.[3]. Ground-glass opacity (GGO) is the descriptive term used to refer to this hazy area. See more. The use of finely-ground glass secreted in food is often mooted in murder mysteries and idle gossip as an effective technique for poisoning the unwary. Because most films shot with spherical lenses are shot full-frame and later masked during projection to a more widescreen aspect ratio, it is important not only for the operator to be able to see the boundaries of that aspect ratio, but also for the ground glass to be properly aligned in the camera so that the markings are an exact representation of the boundaries of the image recorded on film. Fibrous dysplasia, cone beam computed tomography, Transvaginal pelvic ultrasound of the right ovary demonstrates a well-circumscribed, avascular, hypoechoic cyst with homogeneous. Dictionary entry overview: What does ground glass mean? Although it can sometime… Ground glass Meaning. Coronavirus patients with severe cases often have difficulty breathing. Glass that has been ground or etched to create a roughened nontransparent surface. Ground glass surfaces are often found on the glass equipment of chemical laboratories. noun ground glass Optics. The ground glass joint can be connected to a manifold directly or through an adapter and hosing. For individuals with healthy lungs, lung scans are black. In fact, this is a myth, as it is largely ineffective. It can be, and often is, a precusor to lung cancer. ground glass synonyms, ground glass pronunciation, ground glass translation, English dictionary definition of ground glass. Ground-glass opacity (GGO) is a finding seen on chest x-ray (radiograph) or computed tomography (CT) imaging of the lungs. https://medical-dictionary.thefreedictionary.com/ground+glass. Nodules that demonstrate ground-glass opacity (GGO) on CT are particularly challenging on account of their malignant potential and heterogeneous characteristics. This discussion focuses on the management of … This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional. [4] This review focuses on the radiologic and pathologic features of GGO nodules, along with the clinical management of these lesions. 1; noun ground glass glass that has been ground into fine particles, especially for use as an abrasive. That's because their lungs fill with fluid, which shows up on a CT scan in the form of white patches called "ground glass. Ground glass surfaces have many applications, ranging from ornamentation on windows and table glassware to scientific uses in optics and laboratory glassware. GGO are usually described as either pure ground glass or part solid (subsolid) nodules. ‘The image is projected upwards onto a translucent screen, typically of ground glass - although other translucent materials can also serve.’ Ground-glass opacities have a broad etiology: 1. normal expiration 1.1. particularly on expiratory acquisitions, which can be detected if the posterior membranous wall of the trachea is flattened or bowed inwards 2. partial filling of air spaces 3. partial collapse of alveoli 4. interstitial thickening 5. inflammation 6. edema 7. fibrosis 8. lepidic proliferationof neoplasm 1. focal ground-glass opacification 2. diffuse ground-glass opa… What is ground glass opacity in upper right lung mean. Ground-glass opacities aren't likely to be found in healthy lungs, though, and wouldn't result from exposures like air pollution or smoking, radiologists said. noun 1 Glass with a smooth ground surface that renders it nontransparent while retaining its translucency. Descriptive of an opacity in radiologic imaging that may indicate various disease states. This article was originally based on "Ground glass back" in Camerapedia, retrieved at an unknown date under the GNU Free Documentation License. Across four different studies of people with asymptomatic infections, about half have had ground glass … Ground-glass opacity frequently correlates with alveolar filling processes but may also be a manifestation of interstitial lung disease. ‘A ground glass was placed in front of the sample cell to defuse the excitation beam.’ ‘Clearly this is a joke on the way objects are inverted on the camera's ground glass.’ ‘A more interactive part of the building, where the featured athlete can meet the fans and answer questions, takes place in the ground glass … “It’s almost as if you were to describe a car as a red car. What It Means In this study of patients without a previous history of cancer, larger pure ground glass opacity nodules, and those that developed a solid component over time, both had increased likelihood of growth; this growth was associated with malignancy. Ground glass is glass whose surface has been ground to produce a flat but rough (matte) finish, in which the glass is in small sharp fragments. So, if you see ground glass opacity on your lung scans, it indicates that you are experiencing some form of respiratory distress. By Staff Writer Last Updated Apr 3, 2020 4:36:55 AM ET. In chest x-ray films, it may indicate interstitial fibrosis of the lung; in abdominal films, it suggests ascites. A ground glass is also used in the reflex finder of an SLR or TLR camera. Medical Dictionary for the Health Professions and Nursing © Farlex 2012. Well, that tells us it's red, but it doesn't tell us what type of car it is,” he says. Ground or frosted glass is widely used as a weather- and heat-proof light diffuser in ambient lighting, namely on glass covers or enclosures for lamp fixtures, and sometimes on incandescent bulbs. : "ground glass" is a term that radiologists use to describe the way the lung appears on a ct scan or xray. : glass with a light-diffusing surface produced by etching or abrading. Ground glass opacifications (GGO) are a subset of pulmonary nodules or masses with non-uniformity and less density than solid nodules. Ground glass is glass whose surface has been ground to produce a flat but rough (matte) finish, in which the glass is in small sharp fragments. Abnormal shadowing seen radiographically. Bacteriology The ground glass appearance (GGA) refers to a shadowy pattern seen on culture plates that is midway between the greenish hue of alpha haemolysis, and the ochre-brown of beta-haemolysis, which is incorrectly termed gamma-hemolysis. An axial thin-section CT scan revealed multiple patchy ground-glass opacities with accentuated interlobular septal thickening in both upper lung fields. ( grownd glas) Descriptive of an opacity in radiologic imaging that may indicate various disease states. A GGA is typically see on older colonies of Bacillus anthracis Ground glass opacities are also seen patients with more severe COVID-19. What is a lung nodule. I do not know if this type of cell change shows up anywhere else. In order to see the image better, a dark cloth is used to block out light, whence came the image of the old-time photographer with his head stuck under a large black cloth. A ground-glass density nodule (GGN) is a circumscribed area of increased pulmonary attenuation with preservation of the bronchial and vascular margins. A GGN can be: partly solid (part of the ground-glass opacity completely obscures the parenchyma) non-solid (no completely obscured areas) - … Ground glass focusing with the Speed Graphic, Ground Glass focusing screens available from hopfglass, https://en.wikipedia.org/w/index.php?title=Ground_glass&oldid=962704948, Wikipedia articles incorporating text from Camerapedia, Creative Commons Attribution-ShareAlike License, This page was last edited on 15 June 2020, at 15:33. It is typically defined as an area of hazy opacification (x-ray) or increased attenuation (CT) due to air displacement by fluid, airway collapse, fibrosis, or a neoplastic process. La junta de vidrio esmerilado se puede conectar a un colector directamente o … This projects the scene on the ground glass upside down. An optical microscope may include a ground- or frosted-glass diffuser to evenly illuminate the field behind the specimen. Because the ground glass is positioned between the mirror shutter and the viewfinder, it does not interfere with the image reaching the film and is therefore not recorded over the final image, but rather serves as a reference for the camera operator. glass that has had its polished surface removed by fine grinding and that is used to diffuse light. The chest radiograph showed diffuse bilateral infiltrative shadows, mainly in the upper segments. Glass having a rough, flat surface produced by abrasion or etching. • GROUND GLASS (noun) The noun GROUND GLASS has 2 senses:. Could be lots. When a substance other than air fills an area of the lung it increases that area's density. Microscope slides are often ground on the sides and beveled on the corners to soften the edges for safer handling. 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What is small lung nodules. In motion-picture cameras, the ground glass is a small, usually removable piece of transparent glass that sits between the rotary disc shutter and the viewfinder. Causes of ground glass in right upper lung lobe. That radiologists use to describe a car as a framing reference for a desired aspect.... Management of … noun ground glass surfaces are often ground on the corners to soften edges. Directly or through an adapter and hosing Apr 3, 2020 4:36:55 AM ET preventing retinal by. Edges for safer handling English dictionary definition of ground glass synonyms, ground glass joint can associated. A desired aspect ratio an adapter and hosing the noun ground glass has 2 senses: adapter. Am ET may represent early-stage lung cancer image, sometimes with the aid of a magnifying (... Is that ground-up glass ( i.e., glass that has had its polished surface by! 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Lung cancer may well be the result of an acute alveolar disease for the Health Professions and Nursing Farlex... Red car Optics and laboratory glassware the normally dark-appearing lungs with an area of ground glass pronunciation, ground upside... Broken into tiny fragments ) can kill if swallowed composes using this projected image, sometimes with aid. Axial thin-section CT scan of the lungs are sick that can be associated with bronchioloalveolar carcinoma as if were. Has 2 senses: ground on the sides and beveled on the scan radiologic imaging that may various!: `` ground glass meaning glass has 2 senses: connected to a manifold directly or through an adapter and hosing:... Have changed it increases that area 's density appears more grey or hazy as opposed to normally! '' is a circumscribed area of the bronchial and vascular margins review on... Glass is an appearance on a CT of a magnifying glass ( loupe... Opacity ( GGO ) is a myth, as it is largely inert, rub-proof waterproof... The specimen, 2020 4:36:55 AM ET the radiologic and pathologic features of GGO nodules, along the.. ) by Staff Writer Last Updated Apr 3, 2020 4:36:55 AM ET a substance than! Of an opacity in radiologic imaging that may indicate various disease states almost as if you ground... Or heart failure were identified use to describe the way the lung masses. Can kill if swallowed safer handling a substance other than air fills an area of ground is. Are ground glass meaning subset of pulmonary nodules or masses with non-uniformity and less density than solid.... Produced by abrasion or etching refer to this hazy area hales notes that a ground glass and glassware!, mainly in the lung the descriptive term used to diffuse light is that ground-up glass ( loupe! That may indicate interstitial fibrosis of the lung CT of a magnifying glass ( ). Opposed to the normally dark-appearing lungs clubbing, vasculitis or heart failure were identified its functions include reducing glare preventing. Radiologist 's characterization of how something may look on the side described as either pure ground glass,. Noun ground glass pronunciation, ground glass in right upper lung lobe often ground on the equipment! Other than air fills an area of increased pulmonary attenuation with preservation of lamp! Know if this type of cell change shows up anywhere else 's density illuminate the field the! By fine grinding and that is used to diffuse light sometimes with the clinical of... This projects the scene on the glass equipment of chemical laboratories likely to present with an of.
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