Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single frontal radiograph of the chest again demonstrates mild - to - moderate cardiomegaly . Right - sided PICC is seen with tip at the cavoatrial junction . There is minimal left lower lobe opacity again seen , likely due to atelectasis . There is no pneumothorax or pleural effusion . Cardiomediastinal silhouette is unchanged .
    OUTPUT:
    
Unchanged chest radiograph .