Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiographs demonstrate clear lungs bilaterally . There is no focal consolidation identified . The heart size is normal . Redemonstration of tortuous or dilated descending aorta , stable since prior examination . The hilar and mediastinal contours are otherwise unremarkable . No evidence of pulmonary edema or pleural effusion . There is no pneumothorax .
    OUTPUT:
    
No acute intrathoracic abnormality .