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. Author manuscript; available in PMC: 2015 Mar 6.
Published in final edited form as: Dysphagia. 2014 Oct 1;30(1):47–56. doi: 10.1007/s00455-014-9572-3

Figure 1.

Figure 1

The custom made phantom is consisted of the lid, the bottom, and the subsidiary parts. The bottom had eight cylindical tubes ranging from 2 to 25mm in depth and all had the same 15mm diameter. The subsidiary parts included 15 large screws, 8 small screws, 8 large O-rings and 8 small O-rings. The barium milk was filled through the small screw opening and the offset location allowed for release of air bubbles to ensure a completely filled cylinder for accurate calibration. At the conclusion of every experiment, the lid was removed for cleaning the phantom and especially to ensure that new barium milk is used for every experiment because over time, the mixture can separate.