Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: All the monitoring devices are unchanged and in standard position . Lung volumes are low with persistent opacification of the left retrocardiac space for atelectasis . There is minimal pleural effusion alongside the left posterior costovertebral space , better seen in the lateral . Cardiomediastinal silhouette is unchanged with persistent mild cardiomegaly . There is no pneumothorax .
    OUTPUT:
    
Left lower lobe atelectasis with small pleural effusion . Mild cardiomegaly . All the monitoring devices are unchanged .