Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Low lung volumes are present . This accentuates the size of the cardiac silhouette which is at least mildly enlarged . The aorta remains tortuous . There is crowding of the bronchovascular structures but no pulmonary edema is identified . Linear opacities in the lung bases are most compatible with subsegmental atelectasis . No focal consolidation , pleural effusion or pneumothorax is identified . No acute osseous abnormalities seen .
    OUTPUT:
    
Low lung volumes with subsegmental atelectasis in the lung bases .