APPLICATION OF ELECTRICAL-IMPEDANCE TOMOGRAPHY IN DIAGNOSIS OF EMPHYSEMA - A CLINICAL-STUDY

EYUBOGLU B. M., ONER A., BAYSAL U., BIBER C., KEYF A., YILMAZ U., ...More

PHYSIOLOGICAL MEASUREMENT, vol.16, 1995 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 16
  • Publication Date: 1995
  • Doi Number: 10.1088/0967-3334/16/3a/018
  • Journal Name: PHYSIOLOGICAL MEASUREMENT
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Middle East Technical University Affiliated: No

Abstract

In this paper, electrical impedance tomography (EIT) ventilation images from a group of 12 patients (11 patients with emphysema and one patient with only chronic obstructive pulmonary disease (COPD) (chronic bronchitis)) and a group of 15 normal subjects were acquired using a Sheffield mark 1 EIT system, at the levels of second, fourth and sixth intercostal spaces. Patients were diagnosed based on CT scans of the thorax, pulmonary function tests and posteroanterior x-ray graphs. One of the patients with emphysema has also a malignant lung tumour. Ventilation-related conductivity changes at total lung capacity (TLC) relative to residual volume were measured quantitatively in EIT images. These quantitative values demonstrate marked differences compared to those values obtained from the a images of 15 normal subjects. The EIT images of the patients were also compared with the cr images.