Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are hypoinflated . There are bilateral increased vascular markings as well as interstitial opacities , more pronounced in the lower lobes . There is no pleural effusion or pneumothorax . Cardiomediastinal and hilar contours are unremarkable .
    OUTPUT:
    
Increased bronchovascular markings , more pronounced in the lower lobes might represent crowding due to low lung volumes , although pneumonia is diffcicult to exclude .