Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: CARDIOMEDIASTINAL CONTOURS ARE NORMAL . LUNGS ARE CLEAR EXCEPT FOR A FOCAL LINEAR SCARRING IN THE LEFT LOWER LOBE . THERE ARE NO PLEURAL EFFUSIONS . BONES ARE DIFFUSELY DEMINERALIZED
    OUTPUT:
    
FOCAL LINEAR LEFT LOWER LOBE SCARRING WITH OTHERWISE CLEAR LUNGS .