What is a Westermark sign?

A Westermark sign is one of several reported signs of PE on chest radiographs. It represents decreased vascularization at the lung periphery due to mechanical obstruction or reflex vasoconstriction in PE.

What is Palla sign?

Palla’s sign is a clinical sign in which an enlarged right descending pulmonary artery is seen on the chest x-ray in patients with pulmonary embolism. It is of low sensitivity, and its specificity is not known. It exhibits as a “sausage” appearance on X-ray. It is named after italian radiologist Antonio Palla.

What is meniscus sign on chest xray?

In chest roentgenograms, the pulmonary meniscus sign is a crescent-shaped inclusion of air surrounded by consolidated lung tissue. The common cause is aspergilloma. A hydatid cyst is, however, the most common cause in endemic areas.

What is fleischner sign?

Fleischner sign is a radiological sign that aids the diagnosis of pulmonary embolism. The sign indicates the dilatation of the proximal pulmonary arteries due to pulmonary embolism. It was named after Felix Fleischner, who first described it. The Fleishner sign is seen both on X-ray and CT scan of chest/thorax.

What is Hamptons hump?

Hampton’s hump is a radiological sign consisting of a peripheral, wedge-shaped opacification adjacent to the pleural surface, which represents pulmonary infarction distal to a pulmonary embolus.

What is Hampton’s hump?

What is Polo mint sign?

The polo mint sign is a description given to a venous thrombosis on contrast-enhanced CT imaging. When viewed in the axial plane, a thin rim of contrast persists around a central filling defect due to thrombus.

What causes a meniscus sign?

A torn meniscus can result from any activity that causes you to forcefully twist or rotate your knee, such as aggressive pivoting or sudden stops and turns. Even kneeling, deep squatting or lifting something heavy can sometimes lead to a torn meniscus.

What is Carman meniscus sign?

The Carman meniscus sign describes the lenticular shape of barium in cases of large and flat gastric ulcers, in which the inner margin is convex toward the lumen. It usually indicates a malignant ulcerated neoplasm; in cases of benign gastric ulcers, the inner margin is usually concave toward the lumen 1.

What is fleischner method?

The Fleischner sign refers to a prominent central pulmonary artery that can be commonly caused either by pulmonary hypertension or by distension of the vessel by a large pulmonary embolus. It can be seen on chest radiographs, CT pulmonary angiography (CTPA), and MR pulmonary angiography (MRPA).

What are Kerley lines?

Kerley B lines (arrows) are horizontal lines in the lung periphery that extend to the pleural surface. They denote thickened, edematous interlobular septa often due to pulmonary edema.