Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . Mild enlargement of the cardiac is new since ___ . Calcification of the aortic knob is similar to prior . The lungs are clear . No focal consolidation , pleural effusion , or pneumothorax . No radiopaque foreign body .
    OUTPUT:
    
New mild cardiomegaly and / or pericardial effusion . Central venous pressure is not elevated .