Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours appear unchanged . There is new mild elevation of the right hemidiaphragm with streaky opacity most suggestive of minor atelectasis . On the left , there is a streaky left retrocardiac density , most suggestive of atelectasis , with a possible trace pleural effusion . The lung volumes are low . Cholecystectomy clips project over the right upper quadrant . Bony structures are unremarkable .
    OUTPUT:
    
Findings suggestive of mild atelectasis as well as new mild relative elevation of the right hemidiaphragm ; infection is difficult to exclude although doubted .