Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . This accentuates the size of the cardiac silhouette which appears mild to moderately enlarged . The aorta appears mildly tortuous and diffusely calcified . Mediastinal and hilar contours are otherwise unremarkable . The pulmonary vasculature is not engorged . Patchy opacities in the lung bases may reflect areas of atelectasis . No pleural effusion or pneumothorax is demonstrated . There are moderate multilevel degenerative changes seen in the thoracic spine .
    OUTPUT:
    
Low lung volumes with patchy opacities within the bases , potentially atelectasis , however early infection can not be excluded .