Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are linear bibasilar opacities likely due to atelectasis . The lungs are otherwise grossly clear within limitation of relatively low lung volumes . The cardiomediastinal silhouette is within normal limits . No acute osseous abnormalities .
    OUTPUT:
    
Bibasilar atelectasis without definite acute cardiopulmonary process .