Measurement of pharyngeal transit time by electrical impedance tomography.

Clinical physics and physiological measurement : an official journal of the Hospital Physicists' Association, Deutsche Gesellschaft fur Medizinische Physik and the European Federation of Organisations for Medical Physics Pub Date : 1992-01-01 DOI:10.1088/0143-0815/13/a/038

P Liu, H Griffiths, C M Wiles, K M Nathadwarawala, W Stewart

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引用次数: 16

Abstract

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

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电阻抗断层扫描法测量咽传输时间。

研究了电阻抗断层扫描(EIT)测量咽传输时间的可行性。在一组8名健康受试者中，当吞咽不同电导率的溶液时，获得了颈部的成像序列。使用的溶液为水透析液(1.5 S m-1)和自来水(0.04 S m-1)。运动对图像的影响比由解引起的变化更大，但这些影响通过减法技术被抵消了。EIT咽部传输时间参数平均值为370±120 ms。与已建立的涉及电离的视频透视技术相比，EIT的优点是可以进行重复测量而不必担心危险

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Clinical physics and physiological measurement : an official journal of the Hospital Physicists' Association, Deutsche Gesellschaft fur Medizinische Physik and the European Federation of Organisations for Medical Physics

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