Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest . The lungs are essentially clear noting linear bibasilar opacities most suggestive of atelectasis . There is no effusion or pulmonary vascular congestion . Cardiac silhouette is mildly within normal limits . Atherosclerotic calcifications noted at the aortic arch . Hypertrophic changes seen in the spine . No acute osseous abnormalities .
    OUTPUT:
    
No definite acute cardiopulmonary process .