Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are normally expanded and clear . There is mildly coarsened interstitial pattern bilaterally . The cardiomediastinal silhouette , hilar contours and pleural surfaces are normal . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Mildly coarsened interstitial pattern without focal consolidation or effusion could reflect bronchovascular crowding , less likely interstitial edema .