Table 2 Reasons for including each class in the ground-truth segmentations of the magnetic resonance images of the vocal tract during speech.

From: Real-time speech MRI datasets with corresponding articulator ground-truth segmentations

Class

Reason(s) for inclusion

Head

Primary: segmentation of the posterior pharyngeal wall would enable automatic measurement of the distance between the soft palate and the posterior pharyngeal wall

Secondary: segmentation of the upper lip would enable automatic lip motion tracking

Soft palate

Segmentation would enable soft palate shape and motion analysis, and also automatic measurement of the distance between the soft palate and the posterior pharyngeal wall

Jaw

Segmentation of the lower lip would enable automatic lip motion tracking

Tongue

Segmentation would enable tongue shape and motion analysis

Vocal tract

Segmentation would enable vocal tract shape analysis

Tooth space

Included so that there were no holes in the ground-truth segmentations, thus facilitating the post-processing of estimated segmentations