Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral radiographs of the chest demonstrate clear lungs without focal consolidation , pleural effusion , or pneumothorax . The inspiratory lung volumes are slightly decreased from the prior study with minimal increased bronchovascular markings in the bilateral bases consistent with atelectasis . The cardiac silhouette is normal in size . The mediastinal and hilar contours are within normal limits . The pulmonary vasculature is not engorged . No rib fracture is identified .
    OUTPUT:
    
No acute cardiothoracic process . No rib fracture detected .