Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate mild asymmetry of the lung base opacification , attributable to the patient 's scoliosis . Otherwise , lungs are clear . No pleural effusion or pneumothorax identified . Cardiomediastinal and hilar contours are unremarkable .
    OUTPUT:
    
No acute intrathoracic process .