Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP and lateral views of the chest were reviewed and compared to the most recent prior study . The lungs are clear without focal consolidation , pulmonary edema , vascular congestion , or pleural effusion . There is no pneumothorax . Moderate - to - severe cardiomegaly is unchanged , and in the setting of normal pulmonary vessels , could represent cardiomyopathy or pericardial effusion . Calcification of the aortic arch is unchanged .
    OUTPUT:
    
1 . No radiographic evidence of pneumonia . 2 . Moderate - to - severe cardiomegaly with normal oulmonary vessels could represent cardiomyopathy or pericardial effusion .