Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . The lungs are well expanded without focal consolidation , pleural effusion or pneumothorax . Vague streaky opacities are better demonstrated on subsequent CT . Linear atelectasis at the lung bases is seen . Heart size is normal . The aorta is mildly tortuous with aortic knob calcifications . Hilar contours are normal . No upper abdominal or acute osseous abnormality is identified .
    OUTPUT:
    
Bibasilar atelectasis . Please see subsequent CT for further evaluation .