Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A single portable AP semi-upright view of the chest was obtained . Heart is normal size and cardiomediastinal silhouette is stable . Low volume lungs limit assessment for vascular congestion . There is no focal consolidation , pleural effusion or pneumothorax . A vascular stent is noted in the left arm .
    OUTPUT:
    
No evidence of pneumonia .