Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac silhouette is mild to moderately enlarged increased from ___ when it was normal in size though lower lung volumes somewhat exaggerate the sillhouette . The thoracic aortic arch is mildly tortuous . Hilar contours are unremarkable . Lungs are clear . There is no pleural effusion or pneumothorax . There is no evidence of vascular congestion or interstitial edema .
    OUTPUT:
    
Mild to moderate cardiomegaly new since ___ without evidence of vascular congestion or interstitial edema .