A "surgical clip" artifact.
Malott
J C
JC
FASRT, University of Cincinnati Hospital, Department of Radiology, Ohio 45267-0742.
Fodor
J
J
D003951:Diagnostic Errors; D005547:Foreign Bodies / Q000000981:diagnostic imaging*; D006801:Humans; D010388:Pelvis; D011859:Radiography; D013525:Surgical Instruments