Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . Nerve stimulator is again seen projecting over the left hemithorax . There is left base atelectasis . No definite focal consolidation is seen . There is no pleural effusion or pneumothorax . The cardiac and mediastinal silhouettes are stable .
    OUTPUT:
    
Left base atelectasis without radiographic findings to suggest pneumonia .