Soft-tissue "rim" sign in the diagnosis of ureteral calculi with use of unenhanced helical CT.
Heneghan J, Dalrymple N, Verga M, Rosenfield A, Smith R. Soft-tissue "rim" sign in the diagnosis of ureteral calculi with use of unenhanced helical CT. Radiology 1997, 202: 709-11. PMID: 9051021, DOI: 10.1148/radiology.202.3.9051021.Peer-Reviewed Original Research