Radiologic sign

An X-ray image of the intestines, showing coiled loops that are darker on the left and right sides and lighter in the middle

The dark areas on both sides of the intestines indicate that air is present in both sides. This is called "Rigler's sign".

A radiologic sign is an objective indication of some medical fact or quality that is detected by a physician during examination of a radiograph (e.g., a plain film X-ray, CT scan, MRI image).

Examples

Radiologic signs

Cardiovascular	Aortic unfolding Dense artery sign Halo sign

Respiratory	Air crescent sign Deep sulcus sign Golden S sign Hampton hump Kerley lines Peribronchial cuffing Sail sign of the chest Silhouette sign Steeple sign Thumbprint sign Traction bronchiectasis Tree-in-bud sign Westermark sign

Urogenital	Canga's bead symptom

Musculoskeletal	Crescent sign Fabella sign Fat pad sign Osteopathia striata Sail sign of the elbow

Gastrointestinal	Cupola sign Double bubble Endoexoenteric Football sign Hampton's line Hot quadrate sign Mumoli's sign Omental cake Pneumatosis intestinalis Rigler's sign Sentinel loop

Neurological	Hot cross buns Hyperdense middle cerebral artery

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Radiologic sign

Examples

See also