Ring Shadow

A descriptive term for the annular thickening of bronchial walls in a plain chest film in bronchiectasis, which is identical to ‘tram-track shadows’
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.
References in periodicals archive ?
During the early part of this apparition, the ring shadow was projected onto the planet's northern hemisphere, north of Ring A.
After opposition, the ring shadow on the globe (SH R on G) was visible through C(M).
When her boyfriend took her to another doctor for examination, the same ring shadow was seen in the X ray, but the second doctor realized it was not pneumonia.
In particular, the sector of the Division projected against the planet generally appeared black, as the ring shadow projected against the planet was generally visible through this sector.
Sunlight passing through the Cassini Division produces a relatively narrow illuminated strip within the ring shadow where projected onto the planet.
WinJUPOS2,10 and Redshift11 simulations made for spring 2007 showed that the northern edge of the ring shadow extended a little further south at the planet's p.
In the initially indifferent seeing a soft-edged but prominent ring shadow with a dark core appeared to slice across the disk.
Dobbins and Graham remain skeptical about our claim, yet we are both convinced that we see the rings lined up slightly north of the ring shadow, appearing stronger on the western side.
I could see clear divisions in the rings, ring shadows on Saturn's surface, detailed cloud bands, and three moons.
[1,2] Sometimes in off-pump coronary artery bypass radiographs, the ring shadows mislead the treating doctors alike.
In 1929, Artner was the first to describe concentric ring shadows in a barium-filled cecum with a central filling defect.
These ring shadows represent contrast reflux within the lumen between the walls of the intussusceptum and intussuscipiens (Figure 16).