Liu P, Griffiths H, Wiles C M, Nathadwarawala K M, Stewart W
Department of Medical Physics, University Hospital of Wales, Cardiff, UK.
Clin Phys Physiol Meas. 1992;13 Suppl A:197-200. doi: 10.1088/0143-0815/13/a/038.
The feasibility of using electrical impedance tomography (EIT) for measuring pharyngeal transit time has been investigated. Imaging sequences were obtained on the neck in a group of eight healthy subjects when swallowing solutions of different electrical conductivities. The solutions used were aqueous Dioralyte (1.5 S m-1) and tap water (0.04 S m-1). The effects of movement upon the images were large compared with the changes due to the solutions, but these were cancelled by a subtraction technique. The mean value of the EIT pharyngeal transit time parameter was 370 +/- 120 ms. EIT has the advantage that repeated measurements could be performed without fear of hazard in contrast to the established technique of video fluoroscopy which involves ionising
研究了使用电阻抗断层扫描（EIT）测量咽部通过时间的可行性。在一组八名健康受试者吞咽不同电导率溶液时，对其颈部进行成像序列采集。所使用的溶液为口服补液盐溶液（1.5 S m-1）和自来水（0.04 S m-1）。与溶液引起的变化相比，运动对图像的影响较大，但通过减法技术可以消除这些影响。EIT咽部通过时间参数的平均值为370 +/- 120毫秒。与涉及电离的传统视频荧光透视技术相比，EIT的优点是可以进行重复测量而无需担心危害。
