Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest demonstrate the lungs are relatively well - expanded with a small amount of subsegmental bibasilar atelectasis . There is no pleural effusion , pulmonary edema , pneumothorax or focal opacification . The cardiomediastinal silhouette is unremarkable .
    OUTPUT:
    
No acute cardiopulmonary process .