Fig. 5
From: Barium Sulfate Deposition in the Gastrointestinal Tract: Review of the literature
Scanning electron microscopy identifies the foreign material using backscattered electron imaging at 1000x (A) and detail of a fragmenting particle at 2500x (B). Note that the large particles may break down to tiny submicrometer particles often seen scattered in histiocytes by light microscopy. The chemical identification of the particles as Barium sulfate is confirmed by energy dispersive x-ray spectroscopy (EDS) (C), showing peaks for Barium and sulfur. High power view of rhomboid crystals in this case of barium sulfate deposition (D) (H&E, 400 × magnification, 298 micron field width)