Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP semi-upright portable chest radiograph provided . The heart appears mildly enlarged . There is hyperinflation of the lungs , likely related to underlying COPD . No focal consolidation , effusion , or pneumothorax is seen . There is no overt edema . Bony structures are intact .
    OUTPUT:
    
Mild cardiomegaly , COPD , otherwise unremarkable .