Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac silhouette is mildly enlarged . The mediastinal silhouette is unremarkable . There is no edema . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Mild cardiomegaly without CHF . If clinically appropriate , further evaluation with echocardiogram can be considered if not performed previously .