Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is top - normal . The aorta is mildly unfolded . Mediastinal and hilar contours are otherwise unremarkable . There is no pulmonary vascular congestion . Patchy opacities are noted in the lung bases , findings which may reflect atelectasis in the setting of low lung volumes . No pleural effusion or pneumothorax is demonstrated . Minimal loss of height anteriorly of a low thoracic vertebral body is of indeterminate age .
    OUTPUT:
    
Low lung volumes with patchy opacities in the lung bases which may reflect atelectasis , though infection or aspiration can not be excluded in the correct clinical setting . Mild anterior wedge compression deformity of a low thoracic vertebral body , of indeterminate age .