Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: In comparison with chest radiograph from ___ , there is little change . Minimal bibasilar atelectasis . Trace bilateral pleural effusion is unchanged . There is no focal consolidation , pulmonary vascular congestion or pulmonary edema . Mediastinal and hilar contours are stable . Moderate cardiomegaly is unchanged . Note is made of a thin - walled cyst in the left midlung , either a bulla or pneumatocele .
    OUTPUT:
    
Stable cardiomediastinal widening . Following CABG . Trace bilateral pleural effusion . Minimal bibasilar atelectasis .