Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A single portable frontal upright view of the chest was obtained . Allowing for differences in technique , cardiomediastinal silhouette including cardiomegaly is stable . The lungs are symmetrically expanded and clear without focal consolidation , large effusions , or pneumothorax . There is no pulmonary edema .
    OUTPUT:
    
Clear lungs without evidence of pulmonary edema .