Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac silhouette is mildly enlarged . The hilar vasculature is prominent , but well defined . There is no definite consolidation . No pleural effusion or pneumothorax identified . There are mild bony changes in the visualized thoracic spine consistent with patient 's known sickle cell disease .
    OUTPUT:
    
Mild cardiomegaly . No acute findings .