日本口腔科学会雑誌
Online ISSN : 2185-0461
Print ISSN : 0029-0297
ISSN-L : 0029-0297
高速シネMRIによる嚥下運動の描出
道脇 幸博横山 美加衣松 令恵森 紀美江道 健一
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2002 年 51 巻 4 号 p. 237-243

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The synchronized sampling method of MRI (cine MRI) was applied to demonstrate swallowing movement while a normal volunteer repeated liquid swallows synchronized with the scan sequence. The trigger pulses can also control the scan timing and was repeated regularly 128 times at 4-second interval. Since a normal swallow runs within 2 seconds, the volunteer repeated 128 swallows, regularly, so that 70 longitudinal images with 33 ms intervals each were taken. The sequence for MRI images was fast gradient echo; FOV was 256 mm, TR was 33 ms, TE was 2.2 m, Flip angle was 30°, and NEX was conducted twice at a slice thickness of 5 mm. The cine MRI of a swallow clearly demonstrated bolus transport from the mouth to the esophagus. This technique is expected to be helpful to evaluate the movement of swallowing organs.

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