Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable upright view of the chest . Spinal fusion hardware partially imaged in the neck . The heart remains mildly enlarged . Mediastinal contours stable . Mild silhouetting of the right heart border is unchanged likely reflecting the presence of a fat pad . The lungs are clear without focal consolidation , large effusion or pneumothorax . No convincing signs of edema . Bony structures are intact . No free air below the right hemidiaphragm .
    OUTPUT:
    
Cardiomegaly , otherwise unremarkable .