Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were obtained . There is slight left lower lobe atelectasis ; otherwise , the lungs are clear bilaterally with no areas of focal consolidation or pulmonary edema . The cardiomediastinal silhouette is normal . There is no pleural effusion or pneumothorax . There are mild degenerative changes in the spine , otherwise there are no bony abnormalities . There is no free air below the right hemidiaphragm .
    OUTPUT:
    
No acute intrathoracic process .