Fig. 1From: Bismuth chelate as a contrast agent for X-ray computed tomographyThe (a) FTIR spectrum, (b) UV spectrum and (c) 1H-NMR spectrum of the bismuth agent and DTPA, (d) XPS spectrum of the bismuth agent (insert: the picture of bismuth agent in solution (pH 7.0) after storage at 4 °C for 4 months)Back to article page