Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The configuration of a dual - lead pacemaker / ICD device , with leads terminating in the right atrium and ventricle , appears unchanged . The patient is status post coronary artery bypass graft surgery . The cardiac , mediastinal and hilar contours appear stable . The right costophrenic angle appears blunted , which suggests a small pleural effusion , potentially with associated atelectasis . However , when compared to the scout view from the prior CT , which is the most recent prior study , there has been no definite change . Patchy retrocardiac opacity suggesting minor atelectasis also appears unchanged . Predominantly peripheral interstitial changes which are more striking in the lower than upper lungs show no clear change . Lung volumes are again low .
    OUTPUT:
    
Stable appearance of the chest , which includes underlying interstitial lung disease , although without definite evidence for superimposed acute process .