Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild cardiomegaly is re- demonstrated . The mediastinal and hilar contours are unremarkable . Crowding of bronchovascular structures is likely related to low lung volumes . Patchy opacities in lung bases may reflect areas of atelectasis , but infection or aspiration can not be completely excluded . Small right pleural effusion is identified . There is no pneumothorax . No acute osseous abnormality is seen .
    OUTPUT:
    
Low lung volumes . Patchy opacities in the lung bases may reflect atelectasis , but aspiration or infection can not be completely excluded . Small right pleural effusion .