Title: Expiratory Ct: Correlation With Pulmonary Function Tests And Value ForDiscriminating Lung Diseases
Abstract:Aim : To evaluate the factors affecting air trapping on expiratory CT,
its correlation with pulmonary function tests and its value for
discriminating pulmonary diseases. Method : A total of seventy-fi...Aim : To evaluate the factors affecting air trapping on expiratory CT,
its correlation with pulmonary function tests and its value for
discriminating pulmonary diseases. Method : A total of seventy-five
patients 28 chronic obstructive pulmonary disease, 21 asthma, 17
interstitial lung disease, and 9 bronchiectasis patients were included
in this study. All patients underwent inspiratory HRCT, expiratory
HRCT, and pulmonary function tests. Expiratory scans were evaluated for
the presence of air trapping. The cross-sectional area and the ratio of
air-trapping was calculated. Smoking history, duration of illness were
noted. Statistically a correlation between the level and extent of air
trapping, its correlation with pulmonary function tests and factors
affecting air trapping were evaluated. Result :Air trapping was
detected in 59 patients. In ten of these patients there was no mosaic
pattern on inspiratory images. Air trapping on expiratory images was
mostly seen in asthma patients (7 out of 10). The level of air-trapping
showed a good correlation with the extent of air trapping in general,
but in asthma patients the level of air-trapping did not correlate with
the extent of trapping. There was a good correlation between pulmonary
function tests and the level and extent of air trapping. The duration
of illness affected the extent of air-trapping. Conclusion :
Expiratory images are effective for discriminating asthma from other
obstructive lung disease. The level and extent of air trapping detected
on expiratory images which are mainly affected by illness duration, are
good predictors of pulmonary function tests.Read More
Publication Year: 2010
Publication Date: 2010-07-28
Language: en
Type: article
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