Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest demonstrate the lungs are well expanded and clear . The cardiomediastinal silhouette is unremarkable . There is no evidence of pneumothorax , pleural effusion or pulmonary edema . There is no evidence of fracture within the visualized osseous structures . Details of the left shoulder are better characterized on concurrent radiographs of the left shoulder .
    OUTPUT:
    
No acute cardiopulmonary process .