“…To visualize a bolus during the study, VFSS stimuli are prepared by mixing standardized barium sulfate liquid or barium powders with pre‐thickened liquids or commercial thickening powders to achieve radiopacity (Sireci, 2021; Widmark, 2007). It has been reported that barium thickened liquids demonstrated a substantial difference in physical and rheological characteristics, including an increase in density, shear viscosity, and yield stress, as well as sensory perception when compared to their counterpart liquids (Chambers et al, 2017; Cichero et al, 2011; Cichero et al, 2000; Park & Yoo, 2021; Steele et al, 2013). As a result, the VFSS stimuli do not inevitably match with the thickened liquids recommended for the patients.…”