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Rugger Jersey Spine-sclerotic superior and inferior endplates of vertebrae from secondary hyperparathyroidism from renal disease
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Rat-tail Sign-irregularly marginated tapering of esophagus in achalasia AKA Bird's Beak Sign; or of bronchus and biliary duct in carcinoma |
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Rigler's Sign-visualization of both sides of bowel wall on CT and radiography in presence of a pneumoperitoneum |
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Rat-bite Sign-sharply marginated, overhanging bony erosions usually associated with gouty arthritis |
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Rolled Edge Sign-the dense perimeter of a calcified pleural plaque seen en face, especially with asbestos exposure |
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Rachitic Rosary-enlarged costochondral junctions of the ribs in rickets resembling a string of rosary beads |
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Reverse Pulmonary Edema-peripheral airspace disease with sparing of central lung esp in pulmonary infiltrates with eosinophilia |
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Reverse 3 Sign (GI)-appearance of inner margin of duodenal loop from enlarged head of pancreas with tethering at ampulla |
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Rice Grain Calcifications-elongated oval-shaped, soft tissue calcifications the size of rice grains seen in cysticercosis |
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Ribbon Ribs-thinned and attenuated appearance of ribs usually seen with neurofibromatosis |
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Reversed Halo Sign-rounded ground-glass attenuation circled by ring of denser consolidation on CT-seen with cryptogenic organizing pneumonia |
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Reverse Hamburger on Bun Sign-inverted appearance of facet joints on CT and MRI in facet joint dislocation |
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Rod-like Calcifications-breast-calcifications from ductal secretions that form along orientation of the ductal system |
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Rim Sign-Nucs-In this HIDA scan, uptake is seen in the area of the superior aspect of the gallbladder. This is a sign of pericholecystic hepatic activity representing late acute cholecystitis. |
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Ring-Around-the-Artery Sign-air surrounding right pulmonary artery on lateral chest from pneumomediastinum |
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Ring Sign (papilla)-on CT urogram or IVP, contrast outlining a detached papilla in papillary necrosis, often triangular in shape |
