Figure 1

Fabrication of the cadaveric porcine ET phantom. (a) The nasopharyngeal ostium (arrows) of the cadaveric porcine head was identified following mid-sagittal sectioning. (b) Silicone (arrow heads) was injected until completely filling the ET. (c,d) The two lateral and (e) anterior projections of the silicone phantom extracted from the porcine ET.