Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . Cardiomediastinal silhouette and hilar contours are normal . Lung volumes are low . Platelike atelectasis at the left base is moderate . Left hemidiaphragm is indistinct on lateral view with suggestion of haziness . Right lung is clear . No effusion or pneumothorax .
    OUTPUT:
    
Moderate left base platelike atelectasis with indistinct left hemidiaphragm on lateral view with suggestion of surrounding hazy opacity . While this almost certainly represents atelectasis , particularly given low lung volumes , infection is difficult to exclude in the given clinical context .