Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is top normal . There is no large pleural effusion or pneumothorax . There are low lung volumes . Linear opacities in the left mid lung and left base are consistent with atelectasis . There is calcification of the mitral annulus .
    OUTPUT:
    
Opacities in the left base are likely atelectasis . If clinically indicated repeat radiographs with better inspiration is recommended .