Dynamic Magnetic Resonance Imaging of Feeding and Swallowing in a Sitting Position Using a Vertical Open MR System

使用垂直开放式 MR 系统对坐姿喂食和吞咽进行动态磁共振成像

• 批准号: 15390567
• 负责人: HONDA Yasutoshi
• 金额: $ 7.94万
• 依托单位: Okayama University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2003
• 资助国家: 日本
• 起止时间: 2003 至 2004
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15390567/
• 关键词: MRI; Swallowing; Vidcofluorography; Sitting Position; ビデオ内視鏡; 超音波

Magnetic Resonance Imaging(MRI) was performed using a 0.5-T SIGNA-SP open-configuration system. A seat with a back support was built to allow subjects to be seated with their head and neck properly located at the center of the magnet gantry. All images were acquired using a Fast Spoiled Gradient Recalled sequence. We observed the motion of swallowing in the sitting position using a vertically open Magnetic Resonance System. Subjects could self-administer the contrast medium by mouth, using a cup or a spoon, while the images were acquired. Dynamic images in the oral phase were clearer than those in the pharyngeal phase.Compared with videofluorography, dynamic MRI is inferior in temporal resolution with regard to visualization of swallowing. Dynamic MRI of swallowing, provides tomography images in different orientations. Correspondingly, videofluorography provides x-ray, fluoroscopic images that are used in overlapping images of teeth, mandible, and contrast medium. Dynamic MR imaging may be superior for observing and measuring the import, maintenance, and transport of the dorsum of the tongue and transportation to the pharynx, without overlapping images.If temporal resolution were to be improved, 3-and 4-dimensional images (dynamic 3-dimensional image constructs) could be obtained. It is also possible to apply information regarding physiological movement to the diagnosis of diseases of swallowing. With recent advances in MRI technology, the current system, which is suitable for evaluating swallowing, might be improved.

使用0.5-T SIGNA-SP开放配置系统进行磁共振成像（MRI）。构建了一个带有靠背的座椅，以允许受试者坐在其头部和颈部正确位于磁体机架中心的位置。所有图像均使用快速破坏梯度回忆序列采集。我们使用垂直开放式磁共振系统观察了坐位吞咽运动。受试者可以在获取图像时使用杯子或勺子经口自行给予造影剂。口腔期动态图像比咽期更清晰，与视频X线摄影相比，动态MRI在吞咽可视化方面的时间分辨率较差。吞咽的动态MRI，提供不同方向的断层扫描图像。相应地，视频荧光造影提供X射线、荧光透视图像，用于牙齿、下颌骨和造影剂的重叠图像。动态磁共振成像在观察和测量舌背的输入、维持和运输以及向咽部的运输方面可能是上级的，并且没有重叠的图像。还可以将关于生理运动的信息应用于吞咽疾病的诊断。随着MRI技术的最新进展，目前适用于评估吞咽的系统可能会得到改进。