Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest . There is elevation of the right hemidiaphragm . There is retrocardiac opacity and additional streaky left basilar opacity is seen more laterally . Superiorly the lungs are clear . Cardiomediastinal silhouette is within normal limits given patient rotation and midthoracic dextroscoliosis . The bones are diffusely osteopenic but there is no acute osseous abnormality detected .
    OUTPUT:
    
Retrocardiac and left basilar opacity suggestive of atelectasis noting infection can not be excluded . No prior available to assess for interval change .