Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient is rotated to the left on the current exam . Opacity projecting posterior to the heart on the lateral view can not be definitively localize on the frontal . It may be in part due to crossing the vessels and descending thoracic aorta although a component of parenchymal opacity is possible . No acute osseous abnormality identified .
    OUTPUT:
    
Limited exam due to positioning . Opacity on the lateral view seen posterior to the heart which could be overlapping shadows . Underlying component of parenchymal opacity from atelectasis is possible , infection is not excluded .