Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are low lung volumes . This attenuates the size of the cardiac silhouette which is likely within normal limits . Thoracic aorta is mildly unfolded . The mediastinal and hilar contours are within normal limits . The pulmonary vascularity is not engorged . There are minimal atelectatic changes noted at the lung bases . No focal consolidation , pleural effusion or pneumothorax is present . No acute osseous abnormality is seen .
    OUTPUT:
    
Minimal atelectasis in the lung bases in the setting of low lung volumes . Otherwise , no acute cardiopulmonary abnormality .