Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . There is a small residual left pleural effusion likely with associated compressive atelectasis . Lungs otherwise clear . No convincing evidence for edema or pneumonia . No pneumothorax . Cardiomediastinal silhouette is stable . Bony structures intact . No free air below the right hemidiaphragm . On the lateral view a port is seen projecting over the left upper quadrant .
    OUTPUT:
    
Small residual left pleural effusion .