Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is exaggerated by low lung volumes , though is mildly enlarged and stable since at least ___ . No focal consolidation or pleural effusions . Borderline cardiac decompensation . In our review of previous studies , there is significant bullous emphysema and moderate pulmonary fibrosis .
    OUTPUT:
    
No evidence of pneumonia . Heart size , while exaggerated by low lung volumes , is mildly enlarged and stable since at least ___ .