Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single AP portable chest radiograph demonstrates an enlarged heart . Low lung volumes result in bronchovascular crowding . No large pleural effusion or pneumothorax is seen . There is no overt pulmonary edema . No acute osseous abnormality is seen .
    OUTPUT:
    
No acute abnormality . Stable cardiomegaly without overt pulmonary edema .