Dynamic Analysis of Articulatory Movement Using Magnetic Resonance Imaging Movies: Methods and Implications in Cleft Lip and Palate

Abstract

Different movement patterns were observed during articulation in the subject with CLP compared with the normal volunteer. Posterosuperior movement of the tongue and the anterior movement of the posterior pharyngeal wall were clearly visualized in the subject with CLP. Thus, MRI movies appear to be a promising tool for evaluating speech function in patients with CLP because of their noninvasive and nonradiation nature.

Ultrawideband Speech Sensing

“…Although the MakeHuman head already has a posable jaw and tongue, we were required to create a model of the internal vocal tract in Blender and connect it to the mesh. The vocal tract was modeled using MRI movies [8] for an open and closed mouth. As explained in subsequent delta response simulations, the frequency-selective nature of the medium has very little effect on the UWB delta response for this application, and therefore the tissue was modeled using values at 6 GHz ( S/m) taken from [9].…”

A pilot study on characterization of articulatory movements during fricative /s/ sound in an anterior open-bite subject: A tooth-visualized 3-T magnetic resonance imaging video evaluation

“…There have been many studies of use of MRI videos to observe articulatory organs [5e7]. Not only normal-bite subjects but also cleft lip and palate patients have been examined [8]. However, MRI has the limitation that calcified structures, such as the teeth, are almost invisible because they have little mobile hydrogen [9].…”

Dynamic imaging of speech and swallowing with MRI

“…This is in contrast to serial acquisitions that acquire all the data for each image sequentially, providing a complete time series of the motion over only one repetition of the motion, albeit at lower frame rates. In [2], midsagittal movies were made using gating for /pa/, /ta/, and /ka/ sounds showing the movements of the velum at 30 frames per second in cleft palate subjects. The subjects repeated the sounds 128 times in order to obtain the entire data set to construct one average movie of the articulation.…”