Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is borderline enlarged . The aortic arch is calcified . There is no pleural effusion or pneumothorax . A mild interstitial abnormality could be seen with pulmonary edema or atypical infection .
    OUTPUT:
    
Mild diffuse interstitial abnormality . Differential considerations include mild vascular congestion or atypical infection . Correlation with clinical information is suggested .