Signs in Thoracic Imaging胸部征象影像学.pptxVIP

Signs in Thoracic ImagingKaruppasamy, K.1, Abhyankar-Gupta, M.1, Fewins, H.1, Curtis, J.21The Cardiothoracic Centre - Liverpool NHS Trust, 2Aintree University Hospitals NHS Foundation Trust, Liverpool, United KingdomKEY LEARNING OBJECTIVESSigns in radiology represent characteristic descriptive patterns of certain abnormalities. There are several such signs commonly associated with thoracic imaging. Clear understanding of what these signs mean helps the radiologists to interpret the images more effectively, provide a more precise prediction of an underlying pathology and avoid using lengthy descriptions. We consider this poster to be useful as an educational tool for medical students, junior doctors and radiology trainees who can learn about the presence of these signs, understand what they stand for and register the images of those signs in their minds. It will also help to refresh the knowledge of radiologists.Thoracix Radiologic SignsThoracix Radiologic Signs1. Air bronchogram signAir bronchogram sign: Refers to the presence of air filled (patent) bronchi surrounded by air spaces filled with pus or fluid; simply indicates air space disease; e.g. pneumonia2. Air crescent signAir crescent sign: Refers to the air surrounding a radio opaque material in a crescentric manner along both its inner and outer margins indicating cavitary disease; e.g. aspergilloma in an old TB cavity5. Continuous diaphragm signContinuous diaphragm sign: Refers to presence of air between heart diaphragm (pneumomediatinum) or within pericardium (pneumopericardium) making normally invisible parts of central dipahgram visible in continuation with both hemidiaphragms6. Crazy paving signCrazy paving sign: Refers to the combination of ground glass attenuation superimposed on a network of interlobular septal thickening giving it an appearance of a surface paved with slabs of differing shapes; e.g. alveolar proteinosis7. CT angiogram signCT angiogram sign: Refers to the conspicuous enhancing pulmona