Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are no rib fractures visualized . There is no pneumothorax . The lungs are incompletely expanded with associated vascular crowding but otherwise clear . There is no focal consolidation , pleural effusion , or evidence of pneumothorax . The cardiomediastinal silhouette is normal . The pleural surfaces are unremarkable . There is mild degenerative changes seen along the thoracic spine .
    OUTPUT:
    
No evidence of pneumothorax or rib fractures .