期刊
BIO-MEDICAL MATERIALS AND ENGINEERING
卷 27, 期 4, 页码 315-325出版社
IOS PRESS
DOI: 10.3233/BME-161588
关键词
Imaging; ventilation; diagnostic imaging; Electrical Impedance Tomography
资金
- Dragerwerk AG & Co. KGaA, Germany
BACKGROUND: Both Electrical Impedance Tomography (EIT) and Computed Tomography (CT) allow the estimation of the lung area. We compared two algorithms for the detection of the lung area per quadrant from the EIT images with the lung areas derived from the CT images. METHODS: 39 outpatients who were scheduled for an elective CT scan of the thorax were included in the study. For each patient we recorded EIT images immediately before the CT scan. The lung area per quadrant was estimated from both CT and EIT data using two different algorithms for the EIT data. RESULTS: Data showed considerable variation during spontaneous breathing of the patients. Overall correlation between EIT and CT was poor (0.58-0.77), the correlation between the two EIT algorithms was better (0.90-0.92). Bland-Altmann analysis revealed absence of bias, but wide limits of agreement. CONCLUSIONS: Lung area estimation from CT and EIT differs significantly, most probably because of the fundamental difference in image generation.
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