WESTEMARK SIGN -----focal oligemia distal to emboli .
HUPMTON 'S Hump---pleural based consolidation in a form of a truncated cone with pleural base .
MELTING SIGN------The MELTING SIGN describes the resolution ofpulmonary haemmorrhage following pulmonary embolism When there is pulmonar heamorrhage without infarction following PE, the typical wedge-shaped, pleural-based opacification HUMPTON 'S HUMP resolves within a week while preserving its typical shape. It is named due to its resemblance with a melting ice cube .
KNUCKLE SIGN -----distal abrupt tapering of an occluded vessel
FLEISCHER LINES ----fibrotic linear shadow from pleural invagination at the base of the collapse resulting in pseudofissure
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