Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP and lateral views of the chest . Significantly lower lower lung volumes seen on the frontal view . Streaky left basilar opacity is seen potentially due to atelectasis . There is blunting of posterior costophrenic angles which may be due to small effusions , new since prior . No acute osseous abnormality is detected . Atherosclerotic calcifications noted at the aortic arch .
    OUTPUT:
    
Possible small bilateral effusions . Left basilar linear opacities likely due to atelectasis given the low lung volumes noting that infection is not completely excluded .