Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . Patchy opacity at the left lung base may reflect atelectasis although aspiration and pneumonia should also be considered . Portable technique and body habitus limits assessment of the rib cage , particularly along the left chest wall ; however , no obvious displaced fractures are identified . Heart size is normal . There is no pneumothorax , pulmonary edema , or large pleural effusion .
    OUTPUT:
    
Low lung volumes and left basilar opacity , possiby atelectasis , aspiration , or pneumonia . Clinical correlation is recommended . Limited assessment of the ribs reveals no obvious displaced fracture . If clinical suspicion is high , non-contrast chest CT or dedicated rib series could be performed .