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A reversed halo sign is a central ground-glass opacity surrounded by denser consolidation. According to published criteria, the consolidation should form more than three-fourths of a circle and be at least 2 mm thick. [12] It is often suggestive of organizing pneumonia, [13] but is only seen in about 20% of individuals with this condition. [12]
Fleischner sign is a radiological sign that aids the diagnosis of pulmonary embolism. [1] The sign indicates the dilatation of the proximal pulmonary arteries due to pulmonary embolism. [2] It was named after Felix Fleischner, who first described it. [3] The Fleishner sign is seen both on X-ray and CT scan of chest/thorax.
The Fleischner Society is an international, multidisciplinary medical society for thoracic radiology, dedicated to the diagnosis and treatment of diseases of the chest. . Founded in 1969 by eight radiologists whose predominant professional interests were imaging of chest diseases, the Society was named in memory of Felix Fleischner, an inspiring educator, clinician, and researcher who made ...
A lung nodule or pulmonary nodule is a relatively small focal density in the lung. A solitary pulmonary nodule (SPN) or coin lesion, [1] is a mass in the lung smaller than three centimeters in diameter. A pulmonary micronodule has a diameter of less than three millimetres. [2] There may also be multiple nodules.
The criteria for diagnosing pulmonary adenocarcinoma have changed considerably over time. [10] [11] The 2011 IASLC/ATS recommendations, adopted in the 2015 WHO guidelines, use the following criteria for adenocarcinoma in situ: [12] tumor ≤3 cm; solitary tumor; pure "lepidic" growth* [13] No stromal, vascular, or pleural invasion
ground glass; consolidation (diffuse opacity with air bronchograms) location (where is the lesion worst?) upper (e.g., sarcoid, tuberculosis, silicosis/pneumoconiosis, ankylosing spondylitis, Langerhans cell histiocytosis) lower (e.g., cryptogenic fibrosing alveolitis, connective tissue disease, asbestosis, drug reactions)
Ground-glass opacities are common but less extensive than the reticulation; Distribution characteristically basal and peripheral though often patchy. High-resolution computed tomography scans of the chest of a patient with IPF. The main features are of a peripheral, predominantly basal pattern of coarse reticulation with honeycombing
Felix Fleischner was born in Vienna. [3] He became an expert in the field of radiology, and most of his work centered on the chest x-ray. [4] He served as professor and head of radiology of the Second Medical Clinic of the University of Vienna. Being of Jewish ethnicity, [5] Fleischner moved to Boston after Austria was annexed by Germany in 1938.