Magnetic resonance imaging was used to analyze functional positions of the tongue and soft palate in 10 patients and 10 healthy volunteers. The patients had velopharyngeal insufficiency and/or dysfunction of the tongue. With snapshot FLASH (fast low-angle shot) sequences (data acquisition time, less than 1 second), malpositions of the articulatory apparatus were imaged and recorded for follow-up documentation.
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Wein et al. (1991) studied this question.
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