Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest . There is new streaky right basilar opacity , likely due to right middle and lower lobe atelectasis . Superiorly , the lungs are clear . There is no pleural effusion . The left paramediastinal mass is compatible with previously seen cystic structure on chest CT . Cardiomediastinal silhouette is stable given differences in positioning . No acute osseous abnormality is identified . No free intraperitoneal air . Biliary stents are partially visualized .
    OUTPUT:
    
Mostly linear right basilar opacity , most likely due to atelectasis , noting that infection can not be entirely excluded .