Applied potential tomography: A new technique for monitoring pulmonary function

被引：52

作者：

Harris, N.D. ^{[1
]}

Suggett, A.J. ^{[1
]}

Barber, D.C. ^{[1
]}

Brown, B.H. ^{[1
]}

机构：

[1] Department of Medical Physics and Clinical Engineering, University of Sheffield, Royal Hallamshire Hospital, Sheffield S10 2JF, United Kingdom

来源：

Clinical Physics and Physiological Measurement | 1988年 / 9卷 / SUPPL. A期

关键词：

Biomechanics--Respiratory Mechanics - Data Processing--Data Acquisition - Image Processing--Reconstruction;

D O I：

10.1088/0143-0815/9/4A/014

中图分类号：

学科分类号：

摘要：

An electrical impedance tomographic imaging system has been developed which can monitor changes in the resistivity of the thorax at a rate of 5 frames per second. There is a high correlation (r>0.95) between changes in resistivity of the lungs and the volume of air inspired. Calibration of the system allows continuous monitoring of the level of ventilation on exercise up to a minute volume of 45 l min-1. The volumetric accuracy of the system is generally within ±10% of spirometric measurements. Studies of the effect of changes in posture on the calibration of the system show changes of between +9.5% and -3.% in normal male subjects. The performance of the system compares favorably with existing techniques for the noninvasive monitoring of ventilation.

引用

页码：79 / 85