Figure 3.

Example midsagittal/axial frames captured using Protocol 1 for Subject 1 during (a) articulation of /ʃ/ in the front vowel context /i_i/ and (b) interspeech pause. The axial slice provides additional vocal tract information such as the cross-sectional area in the pharyngeal airway and grooving of the tongue (see the solid arrow in (a)). Partially saturated spins (see the hollow arrows in (b)) clearly indicate where one slice is located with respect to the other slice. See also Movie1 in the supplementary material.