Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are low lung volumes . This accentuates the size of the cardiac silhouette which is likely top normal . The aorta is tortuous and diffusely calcified . The pulmonary vascularity is not engorged . Patchy opacities are noted in the lung bases , which could reflect atelectasis , though aspiration or infection can not be excluded . There is no pneumothorax . Probable small trace right pleural effusion is noted . There is no acute osseous abnormality .
    OUTPUT:
    
Probable small right pleural effusion . Low lung volumes with probable bibasilar atelectasis .