Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiographs were obtained . There is mild bibasilar atelectasis fat but no focal opacity is identified . The cardiac silhouette is moderately enlarged without frank pulmonary edema . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Moderate cardiomegaly without frank pulmonary edema .