Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were obtained . The patient is slightly rotated . The lungs are symmetrically expanded and clear . Pulmonary vasculature is within normal limits . Heart is normal in size , and mediastinal contour is unremarkable . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
No acute intrathoracic abnormality .