Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable view of the chest demonstrates low lung volumes . There is increased opacification in the left base with obscuration of the hemidiaphragm medially , which most likely represents atelectasis . There is no pneumothorax or definite pleural effusion . Pleural surfaces are normal .
    OUTPUT:
    
Increased opacification at the left base , which most likely represents atelectasis . However , in the appropriate clinical setting findings could represent a developing consolidation or aspiration .