Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear . There is no consolidation , effusion or edema . Cardiac silhouette is within normal limits . There is somewhat increased density of the aortic arch which may be technical however repeat with PA technique is suggested to further evaluate . No acute osseous abnormalities .
    OUTPUT:
    
No acute cardiopulmonary process . Apparent increased density projecting over the aortic arch , potentially technical however further clarification with PA film is suggested to confirm .