Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right PICC terminates in low SVC . Small opacity at the left lung base near the costophrenic angle likely reflect atelectasis . Cardiomediastinal silhouette is normal size . There is no pneumothorax or large pleural effusion .
    OUTPUT:
    
No convincing radiographic evidence of pneumonia is identified . Small opacity at the left lung base is likely atelectasis .