Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is enlarged . The mediastinal and hilar contours are unremarkable . The lung volumes are low , likely exaggerating the heart size . Ample chest wall soft tissues are present . No pleural effusion or pneumothorax is seen .
    OUTPUT:
    
Cardiomegaly and low lung volumes , but no acute cardiopulmonary process .