Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable frontal upright view of the chest shows clear lungs without focal opacity , pleural effusion or pneumothorax . Mild cardiomegaly is unchanged . The upper abdomen is unremarkable . The bones and soft tissues appear normal .
    OUTPUT:
    
Stable mild cardiomegaly . No acute cardiopulmonary process .