Does MRI contribute to the investigation of palatal function?

The results of a pilot study into the value of MRI scanning in investigation of velopharyngeal function are discussed. MRI offers potential advantage over naso-endoscopy in being noninvasive and over video fluoroscopy in avoiding radiation. However, it requires costly equipment and patient cooperation, which limits its use in young patients. Ten normal volunteers and 15 patients with speech problems underwent MRI of the velopharyngeal port at rest and during sustained phonation of word /a/. Optimal planes for scanning were determined. Images were obtained in mid-sagittal, coronal and horizontal planes at the level of the hard palate and in the plane of the levator axis. Computer assisted measurements were possible of the velopharyngeal closure, forward movement of posterior pharyngeal wall, velar lift, velar extensibility and medial movement of the lateral pharyngeal wall. MRI has a potential role in investigation of velopharyngeal incompetence and planning its surgical repair.