Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . No focal consolidation . Focal opacity at the left costophrenic sulcus with obscuration of the left hemidiaphragm . Heart size is at the upper limits of normal . There are no significant pleural effusions or pneumothorax .
    OUTPUT:
    
No overt abnormalities . Left lung base suboptimally assessed due to technique . If there is concern for infection , consider repeat 2 - view CXR .