OBJECTIVE. This study evaluates the relationships between quantitative CT (QCT) and
spirometric measurements of disease severity in cigarette smokers with and without chronic …

Chronic obstructive pulmonary disease (COPD) is characterized by the presence of airflow
obstruction caused by emphysema or airway narrowing, or both. Low attenuation areas …

Purpose To correlate currently available quantitative CT measurements for airway disease
with physiological indices and the body-mass index, airflow obstruction, dyspnea, and …

Background CT is used to quantify abnormal changes in the lung parenchyma of smokers
that might overlap chronic obstructive pulmonary disease (COPD), but studies on the …

Objectives The purposes of this study were to evaluate the reference range of quantitative
computed tomography (QCT) measures of lung attenuation and airway parameter …

OBJECTIVE. The purpose of this study was to determine whether measurements of lung
attenuation at inspiration and expiration obtained from 3D lung reconstructions reflect the …

Background Gas trapping quantified on chest CT scans has been proposed as a surrogate
for small airway disease in COPD. We sought to determine if measurements using paired …

OBJECTIVE. The purpose of our study was to determine the attenuation threshold value for
the detection and quantification of air trapping using paired inspiratory and expiratory …

Purpose: To analyze the relationship between airflow limitation and airway dimensions from
the third to the fifth generation of bronchi in patients with chronic obstructive pulmonary …

The severity of chronic obstructive pulmonary disease (COPD) is evaluated not only by
airflow limitation but also by factors such as exercise capacity and body mass index. Recent …