Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are hypoinflated with crowding of vasculature and left lower lobe atelectasis . The lungs are otherwise clear . No pleural effusion or pneumothorax . Prominence of the cardiomediastinal silhouette is due to supine positioning and low lung volumes . Hila are unremarkable . Visualized osseous structures are unremarkable without displaced rib fracture . Upper abdomen is within normal limits .
    OUTPUT:
    
1 . No acute cardiopulmonary process . Specifically no pneumothorax . 2 . No displaced rib fracture .