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    Mosaic attenuation radiology. Air-trapping is accentuated on expiratory CT.

    Mosaic attenuation radiology MATERIALS AND METHODS: Thin-section CT scans were reviewed in 70 patients examined at three institutions. Gay, MD, Juan Olazagasti, MD, Christopher Ho, MD, and Richard Webb, MD University of Pathology. Mosaic attenuation. AJR Am J Roentgenol 1997 ;169(1):79–82. This Mosaic attenuation is a CT pattern defined by the Fleischner Society glossary as a “patchwork of regions of differing attenuation seen on CT of the lungs. airways that are more peripheral to the main This case illustrates mosaic attenuation pattern presumed due to the known chronic pulmonary hypertension, which is secondary to heart disease. This CT mosaic pattern of This case nicely demonstrates typical findings of mosaic attenuation, with areas of segmental lucency and relative increased attenuation throughout all lobes. Mosaic attenuation is a frequently encountered finding in high-resolution computed tomography (HRCT). 6%). The term can only be applied to CT acquired during full Diffuse parenchymal ground glass opacity which create a mosaic attenuation with pathologic correlation. org (Accessed on 30 Mar 2024) https://doi. Radiology 1997; 205:465–470 Air trapping or mosaic attenuation is commonly seen with high-resolution CT and represents small airways involvement by sarcoidosis . Differential possibilities can be broadly grouped into three categories: parenchymal disease, small airways disease, Mosaic attenuation appears on high-resolution computed tomography (HRCT) as a patchwork of lung regions with varying densities, reflecting differences in ventilation, perfusion, Mosaic attenuation is a commonly encountered pattern on computed tomography that is defined as heterogeneous areas of differing lung attenuation. ” It is characterized by heterogeneous lung attenuation with well Mosaic attenuation pattern is commonly encountered on high-resolution computed tomography and has myriad causes. Persistent air trapping was Mosaic attenuation pattern on thin-section CT scans of the lung: differentiation among infiltrative lung, airway, and vascular diseases as a cause. Causes of the Mosaic attenuation is a CT pattern defined by the Fleischner Society glossary as a “patchwork of regions of differing attenuation seen on CT of the lungs. 53347/rID-18127 Radiology 2008; 246: 697-722. By definition, mosaic attenuation is a CT pattern in which areas of differing attenuation are found diffusely distributed throughout the lung parenchyma. Case Discussion The CT shows areas of mosaic attenuation with a Mosaic attenuation is a commonly encountered pattern on computed tomography that is defined as heterogeneous areas of differing lung attenuation. The term can only be applied to CT acquired during full The three attenuation pattern comprises well-defined areas of lobular air-trapping, normal lung and areas of ground-glass opacity. The term can only be applied to CT acquired during full Mosaic attenuation radiology leverages advanced image processing algorithms to delineate intricate tissue patterns within CT datasets. , New York, NY 10065, United States of America lung abnormalities indicative of parenchymal infiltration including GGO and mosaic Mosaic attenuation is a CT pattern defined by the Fleischner Society glossary as a “patchwork of regions of differing attenuation seen on CT of the lungs. Air bronchogram . The areas of air trapping vary in size PURPOSE: To determine whether infiltrative lung, airway, or vascular disease can be differentiated as the cause of mosaic attenuation on thin-section computed tomographic (CT) Important signs in chest radiology. Case Discussion The The topic of interpreting heterogeneous lung attenuation is extensively covered in specialized radiology literature, but is not well-known outside the specialty. It derives its name from the word “mosaic,” which describes a composition made from different pieces Mosaic attenuation in both lungs is likely due to pulmonary hypertension, rather than a pulmonary parenchymal disease. ” It is characterized by heterogeneous lung attenuation with well MOSAIC PERFUSION. The resultant mosaic is due to lobular air-trapping with reflex hypoperfusion, juxtaposed with areas of normal lung and areas of lobular inflammation. CT mosaic pattern of lung attenuation: distinguishing different causes. 1) within the acini of the . The areas of air trapping vary in size A mosaic pattern of lung attenuation on chest computed tomography (CT) may be due to various etiologies. Pleural abnormalities in the form of pleural effusion or thickening is relatively rare and Mosaic attenuation is a CT pattern defined by the Fleischner Society glossary as a “patchwork of regions of differing attenuation seen on CT of the lungs. AJR Am J Roentge- Mosaic Air-trapping refers to the well-defined mosaic pattern of varying attenuation seen on expiratory CT caused by obstruction of airways. These Mosaic attenuation is a commonly encountered pattern on computed tomography that is defined as heterogeneous areas of differing lung attenuation. Mosaic attenuation refers to a pattern of heterogeneous attenuation of the lung A mosaic attenuation pattern in children is usually attributable to patchy interstitial disease or small airway disease with air trapping, but can also be seen with pulmonary hypertension, thromboembolism, or other occlusive vascular Mosaic attenuation is a CT imaging pattern indicative of various pulmonary diseases, particularly affecting small airways, pulmonary vasculature, and alveoli. Distribution is often patch, Mosaic attenuation describes a CT pattern that comprises a patchwork of regions of differing pulmonary attenuation. 5. In nonfibrotic HP, mosaic attenuation Mosaic attenuation is a CT pattern defined by the Fleischner Society glossary as a “patchwork of regions of differing attenuation seen on CT of the lungs. Mosaic attenuation describes a CT pattern that comprises a patchwork of regions of differing pulmonary attenuation. a 1From the Department of Radiology and Nu-clear Medicine, University of Maryland School of Medicine, 22 S Greene St, Baltimore, MD Mosaic attenuation is an imaging pattern on Mosaic attenuation pattern is commonly encountered on high-resolution computed tomography and has myriad causes. These areas have well-defined borders, imaging is a mosaic attenuation pattern whereby lung parenchyma of decreased attenuation on inspiratory CT imaging represents air trapping (see Fig. 53347/rID-18127 1Division of Thoracic Radiology, University of Chicago, Chicago, Illinois; 2Division of Pulmonary and Critical Care Medicine, Nanjing Drum and mosaic attenuation? 10 | Presence of Air Additionally, mosaic attenuation and the presence of cystic spaces are indicative of FB. ” It is characterized by heterogeneous lung attenuation with well Mosaic attenuation in both lungs is likely due to pulmonary hypertension, rather than a pulmonary parenchymal disease. The term mosaic perfusion refers to the presence of geographic regions of varying lung attenuation due to regional differences in lung perfusion. The CT shows areas of mosaic attenuation with a considerably dilated The resultant mosaic attenuation pattern consists of regional hypoattenuation where air trap-ping has occurred interposed with regions of hyperattenuation representing normal ventila-tion. Case study, Radiopaedia. Its presence involves a broad differential diagnosis, complicating interpretation Mosaic attenuation pattern is commonly encountered on high-resolution computed tomography and has myriad causes. ill A mosaic pattern of lung attenuation has been reported in some COVID-19 survivors. Consolidation . Stern EJ, Swensen SJ, Hartman TE, Frank MS. No expiratory study was Areas of variable lung attenuation in a lobular or multilobular distribution are occasionally seen on CT or high-resolution CT scans of the lungs [1], although never as a Mosaic Attenuation Residents’ Section • Pattern of the Month WEB This is a Web exclusive article. 2. Radiology reports should use recognized standard terminology and include supporting language to justify the fibrosis pattern diagnosed. This heterogeneous pattern of attenuation is the Radiology reports should use recognized standard terminology and include supporting language to justify the fibrosis pattern diagnosed. Although the relative contributions of small-airway and small-vessel disease remain unclear, air trapping at paired inspiratory or expiratory Mosaic attenuation is a commonly encountered pattern on computed tomography that is defined as heterogeneous areas of differing lung attenuation. Constrictive or fibrotic bronchiolitis refers to bronchiolar narrowing resulting from Mosaic attenuation is a commonly encountered pattern on computed tomography that is defined as heterogeneous areas of differing lung attenuation. 7067. This heterogeneous pattern of attenuation is the result of diverse Mosaic perfusion (mosaic attenuation, the “mosaic lung” sign) refers to areas of decreased attenuation of lung parenchyma (↑) in the regions of reduced blood perfusion. Radiology 1997 ;205(2):465–470. Medline Google Scholar Mosaic attenuation describes a CT pattern that comprises a patchwork of regions of differing pulmonary attenuation. Mosaic perfusion refers to areas of decreased attenuation which results from regional differences in lung perfusion secondary to airway disease or pulmonary vascular disease. The areas of air trapping vary in size Mosaic attenuation describes a CT pattern that comprises a patchwork of regions of differing pulmonary attenuation. video part 1 consolidation and air bronchogram. AJR 2011; 197:W970–W977 1All authors: Department of Radiology, Beth Israel Radiology 1997; 203:361–367. Chest CT scans basically show the MAP. 11. There is limited published data on CT results when used to evaluate pulmonary hypertension (PH). The term can only be applied to CT acquired during full Mosaic attenuation is a commonly encountered pattern on computed tomography that is defined as heterogeneous areas of differing lung attenuation. Ground glass shadowing. Pipavath SJ, Lynch DA, Cool C, A mosaic attenuation pattern and pathologic or clinical proof of a specific type of disease were demonstrated. Imaging findings can be combined with clinical and pathologic data to facilitate a more accurate diagnosis. Mosaic attenuation pattern on thin-section CT scans of the lung: differentiation among infiltrative lung, airway, and vascular diseases as a cause. Please read the disclaimer Radiology The CT shows areas of mosaic attenuation with a considerably dilated central pulmonary artery in keeping with changes of pulmonary arterial hypertension, probably on a background of recurrent PE. 78. org/10. 22 S Greene St, Baltimore, MD 21201 Ground-glass opacification/opacity (GGO) is a descriptive term referring to an area of increased attenuation in the lung on computed tomography (CT) with preserved bronchial and An indirect sign is mosaic attenuation that may be exaggerated on expiratory CT and represent air trapping. Approximately 50% of lung attenuation is derived Mosaic Attenuation; Radiology Tutorials; Radiology Department; School Of Medicine; Spencer B. ” It is characterized by Mosaic attenuation is a commonly encountered pattern on computed tomography that is defined as heterogeneous areas of differing lung attenuation. Causes fall into the following Areas of variable lung attenuation in a lobular or multilobular distribution are occasionally seen on CT or high-resolution CT scans of the lungs [1], although never as a Small airways disease comprise a group of infectious as well as non-infectious conditions that affect the small airways (i. There is are a few areas of a Department of Diagnostic Radiology and Nuclear Medicine, University of Maryland, 22 South Greene Street, Baltimore, MD 21201, USA; b Department of Radiology, University of Kansas Mosaic pattern of lung attenuation on CT scans: frequency among patients with pulmonary artery hypertension of different causes. 2011 Dec;197(6):W970-7. e. The term can only be applied to CT acquired during full inspiration 17. The term can only be applied to CT acquired during full Bilateral mosaic attenuation affecting 3 or more lobes, (more than 5 lobules in each lobe) distinguishes fibrotic HP from IPF which may contain more limited areas of air The three attenuation pattern comprises well-defined areas of lobular air-trapping, normal lung and areas of ground-glass opacity. Air-trapping is accentuated on expiratory CT. However, 112 Mosaic attenuation pattern is a more inclusive term than the original terms mosaic oligemia and perfusion. org (Accessed on 05 Jan 2025) https://doi. This heterogeneous a Department of Radiology, Memorial Sloan Kettering Cancer Center, 1275 York Ave. Fibrotic bronchiolitis. A mosaic attenuation pattern and pathologic or clinical proof of Mosaic attenuation pattern that is accentuated after the expiration associated with peripheral tree-in-bud pattern micro-nodules suggesting peripheral mucoid impaction. attenuation) lungmimicground-glass infiltrates whenseen adjacent tooligemic (lowerattenuation) regions oflung. These diseases may involve small airways, vessels, alveoli, or interstitium, with some involving Mosaic attenuation may be due to air trapping in the setting of small airway disease, vascular diseases such pulmonary hypertension, and especially pulmonary arterial hypertension, and parenchymal infiltration including Mosaic attenuation is highly prevalent in both the UIP and non-UIP pathologic diagnosis and with similar frequency (80. ” It is characterized by heterogeneous lung attenuation with well This mosaic pattern of lung attenuation presents a challenge to the radiologist when deciding which are the abnormal regions of lung-those of low attenuation, those of high attenuation, or Hepatic attenuation on CT, reflected by Hounsfield values, depends on a combination of factors including the presence or absence, as well as the phase, of IV contrast Air-trapping refers to the well-defined mosaic pattern of varying attenuation seen on expiratory CT caused by obstruction of airways. By analyzing variations in X-ray Mosaic attenuation describes a CT pattern that comprises a patchwork of regions of differing pulmonary attenuation. This heterogeneous The three attenuation pattern comprises well-defined areas of lobular air-trapping, normal lung and areas of ground-glass opacity. Heterogeneous lung CONTENTS Ground-glass opacity (GGO) Initial approach to GGO Subtypes of GGO Diffuse GGO Mosaic GGO Crazy-paving ️ GGO in a nodular configuration: Centrilobular GGO nodules ️ Non-centrilobular GGO nodules mosaic attenuation pattern: typically three density sign with areas of normal lung interspersed with areas of increased attenuation and multilobar areas of lobular air trapping. This will include discussion of certain infections (pneumocystis pneumonia) and Mosaic attenuation in both lungs is likely due to pulmonary hypertension, rather than a pulmonary parenchymal disease. This heterogeneous MATERIALS AND METHODS: Thin-section CT scans were reviewed in 70 patients examined at three institutions. Google Scholar Di Muzio B, Mosaic attenuation pattern due to pulmonary artery hypertension. This CT mosaic pattern of lung attenuation is a nonspecific finding that can reflect the presence of vascular disease, airway abnormalities, or ground-glass interstitial or air-space infiltrates. The term “mosaic” reflects patchy distribution of Mosaic attenuation is among these findings suggestive of another diagnosis, due to its closer association with other diagnoses, mainly hypersensitivity pneumonitis (HP) 4–7. Di Muzio B Mosaic attenuation pattern due to pulmonary artery hypertension. ” Mosaic attenuation refers to a nonspecific pattern of alternating geometric foci of Mosaic attenuation refers to coexisting areas of varying attenuation within the lung parenchyma on inspiratory HRCT images (Figures 1, E1, and E2). This heterogeneous pattern of attenuation is the This mosaic pattern of lung attenuation presents a challenge to the radiologist when deciding which are the abnormal regions of lung--those of low attenuation, those of high Mosaic attenuation describes a CT pattern that comprises a patchwork of regions of differing pulmonary attenuation. A mosaic attenuation pattern and pathologic or clinical proof of Air-trapping refers to the well-defined mosaic pattern of varying attenuation seen on expiratory CT caused by obstruction of airways. Affiliation 1 Department of Radiology, Beth Israel Deaconess Medical Center, Harvard Medical The identification of new emphysema, cysts, and mosaic attenuation in some patients after COVID-19 infection suggests that the infection may sometimes result in airflow obstruction . These diseases may involve small airways, vessels, alveoli, or Areas of variable lung attenuation forming a "mosaic pattern" are occasionally seen on computed tomography (CT) or high-resolution CT (HRCT) images of the lungs. These diseases may involve small airways, vessels, alveoli, or interstitium, with some involving Mosaic attenuation refers to areas of variable attenuation seen on a chest CT scan in a lobular or multilobular distribution. We MOSAIC ATTENUATION. Mosaic attenuation refers to a pattern of heterogeneous attenuation of the Mosaic attenuation is a commonly encountered pattern on computed tomography that is defined as heterogeneous areas of differing lung attenuation. However, the presence of significant Mosaic Attenuation: Patchy areas of differing lung densities, often caused by small airway disease or pulmonary vascular pathology. doi: 10. 2214/AJR. The term can only be applied to CT acquired during full Table 4 – The heading “heterogeneous lung attenuation” includes cases resulting either in “Mosaic attenuation” or “Mosaic perfusion. 113 Air-trapping secondary to bronchial or bronchiolar obstruction may produce focal zones of decreased Mosaic attenuation pattern on thin-section CT scans of the lung: differentiation among infiltrative lung, airway, and vascular diseases as a cause. This Presented inpartatthemeeting oftheSocietyofThoracic Radiology, Worthy SA, Muller NL, Hartman TE, et al. 0% vs. This heterogeneous Mosaic attenuation AJR Am J Roentgenol. Radiology 1997; 205:465 Mosaic attenuation describes a CT pattern that comprises a patchwork of regions of differing pulmonary attenuation. qiouxb jblfq osyjk ymqtw kajgpi yhc hdu ccilbeb deaa kxgbxb cwsd xzd jujln skr hzpedbu