Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size and cardiomediastinal contours are normal . A coronary stent is in stable position . Lung volumes are low and a small linear opacity in left lung base is consistent with atelectasis or scar . No focal consolidation , pleural effusion , pneumothorax .
    OUTPUT:
    
No focal consolidation or cardiomegaly .