Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A single AP radiograph was reviewed . Cardiomediastinal and hilar contours are stable . There is no pleural effusion or pneumothorax . There are low lung volumes causing bronchovascular crowding . A right basilar opacity partly silhouetting the right hemidiaphragm is noted . Left basilar atelectasis is also present . A high riding right humeral head with a top normal acromio-clavicular interval is noted , which may reflect a prior injury .
    OUTPUT:
    
1 . Low lung volumes with left basilar atelectasis and right basilar opacity concerning for pneumonia or aspiration . 2 . High riding right humeral head and top normal acromio-clavicular interval , which may reflect prior injury . Clinical correlation is recommended .