Radiographic visualization (OR imaging) with barium sulfate (BaSO<sub>4</sub>) (in blue) in comparison with SMAT (Gastrografin) (in red) contrast passage time of the ampulla coli. MathesKarina A. RadelofKatharina EngelkeElisabeth RohnKarl PfarrerChristiane FehrMichael 2019 <p>Percentage of animals and frequency at measuring time point; y = number of animals in percent (%) in which contrast media could be found in the ampulla coli; x = time point during the contrast passage (in hours).</p>