Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is increased density projecting over the lung apices bilaterally , right greater than left which is most likely external due to patient 's hair . Elsewhere , lungs are clear . The cardiomediastinal silhouette is within normal limits . No acute osseous abnormalities .
    OUTPUT:
    
Opacity projecting over lung apices , right greater than left , which is felt most likely to be external and represent patient 's hair however if continued clinical concern , repeat frontal view with repositioning is suggested . No definite acute cardiopulmonary process .