The department of radiology at the University of Pennsylvania has many electronic resources at your fingertips. Here are a few links to help you find what you need.
Two articles on surgical foreign bodies:
Medical Devices of the Abdomen and Pelvis (3.3MB)
Tim B. Hunter, MD, Mihra S. Taljanovic, MD; RadioGraphics 2005; 25:503-523.
Imaging of Surgical Paraphernalia: What Belongs in the Patient and What Does Not (1.01MB) Kenneth A. Wolfson, MD, Leanne L. Seeger, MD, Barbara M. Kadell, MD, Jeffrey J. Eckardt, MD; RadioGraphics 2000; 20:1665-1673.
Yottalook: A radiology-centric search engine created by our very own Drs. Woojin Kim and Bill Boonn, for Teaching Files, References, and Peer Reviewed Images