Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is at the upper limits of normal size . There is slight calcification and mild unfolding along the descending aorta . Mild subpleural apical thickening suggests scarring bilaterally . Streaky left parahilar opacities in the left lower lung suggest mild atelectasis , probably in the left lower lobe , although not entirely specific and other etiologies such as early bronchopneumonia could be considered . There is no pleural effusion or pneumothorax . The bony structures are unremarkable .
    OUTPUT:
    
Streaky left lower lobe opacities which may be associated with minor atelectasis but other etiologies such as very early bronchopneumonia are not excluded . If pulmonary symptoms are present or for other clinical concern , short - term followup radiographs could be considered if clinically indicated .