Reflections - Rings, Slings, and Other Things: Vascular Compression of the Infant Trachea Updated from the Midcentury to the Millennium -- The Legacy of Robert E Gross, MD, and Edward B D Neuhauser, MD - Radiology has played a crucial role in delineating vascular causes of airway obstruction -- That is, rings, slings, and other things -- In infants, from the 1940s with conventional radiographs and barium esophagrams, through the 1960s-1970s with angiography, to the 1980s and 1990s with CT and MR imaging/