Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is at the upper limits of normal size . There is mild unfolding of the thoracic aorta . Allowing for differences in technique , the mediastinal and hilar contours appear unchanged . A linear opacity projecting over the right mid lung suggests minor atelectasis . Slight posterior opacification in each costophrenic angle is of uncertain significance but could also be seen with minor atelectasis . There are no pleural effusions or pneumothorax . The bony structures appear within normal limits .
    OUTPUT:
    
Patchy opacities most suggestive of minor atelectasis ; pneumonia is unlikely but follow - up radiographs could be considered if there are pulmonary signs or symptoms .