Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest were acquired . In the left mid lung , there is minimal scarring and / or atelectasis . There is no focal consolidation . The heart size is normal . Mediastinal contours are normal . There are no pleural effusions . No pneumothorax is seen . Multiple old bilateral rib fractures are redemonstrated .
    OUTPUT:
    
No acute cardiac or pulmonary process .