Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral chest radiograph demonstrates low lung volumes . No focal opacity convincing for pneumonia is present . Relative to prior examination , the cardiomediastinal silhouette is stable . Heart is top normal in size . No overt pulmonary edema , pneumothorax , or large pleural effusion is present . A posterior fifth right rib deformity is noted , likely chronic fracture . No acute osseous abnormality is detected .
    OUTPUT:
    
No evidence of acute cardiopulmonary abnormalities .