donut sign

donut sign

, doughnut sign
One of several radiologic findings in which a halo surrounding an apparently empty space is present. It is seen, e.g., (a) on chest x-rays of hilar lymphadenopathy, when lymph nodes surround a bronchus; (b) in abdominal imaging, when a thickened bowel wall surrounds the intestinal lumen or an intussusception; and (c) in bone scans, when a rim of tracer uptake surrounds a "cold" center.
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A couple have clouds in the sky and some more painterly detail than the others, including Randy's Donuts, showing a ridiculously big donut sign on top of a building, and Cuban Diner, with a "Cuban food at it's best" sign reproduced including its grammatically incorrect words.
While "Iron Man 2" spotlights a local icon by posing Tony Stark at the center of the Randy's Donut sign, smaller films such as "Greenberg," "Cyrus," "Mother and Child" and Los Angeles Film rest opener "The Kids Are All Right" leave the landmarks behind, burrowing into the various residential neighborhoods to show a less familiar and ultimately more representative side of the city.
Donut sign in West Los Angeles or the Tail of the Pup hot dog stand.