Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is normal . The hilar and mediastinal contours are normal . The lungs are clear without evidence of focal consolidations concerning for pneumonia . There is no pleural effusion or pneumothorax . There is a subtle fracture at the left anterolateral seventh rib , mildly displaced as well as a possible subtle fracture of the left posterolateral eighth rib . In the absence of priors , this is of indeterminate chronicity .
    OUTPUT:
    
No acute intrathoracic abnormalities identified . Subtle displaced fractures involving the left seventh and eighth ribs of indeterminate chronicity . If there is further concern for rib fractures , a dedicated rib series would be recommended for further evaluation .