Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: In comparison to the prior exam , the lung volumes are low , accentuating the vascular structures . There is a hazy opacity at the right base , which given the low lung volumes , is likely atelectasis , although in the proper clinical setting , pneumonia can not be fully excluded . There is no evidence of pulmonary edema , pleural effusion or pneumothorax . The heart is mildly enlarged , and stable from the prior exam . Tortuosity of the aorta is unchanged . The mediastinal contours are within normal limits . Moderate upper thoracic dextroscoliosis is stable . Rib deformities on the right reflect old healed injuries .
    OUTPUT:
    
1 . Hazy opacification at the right base , in the setting of low lung volumes , is likely atelectasis . In the proper clinical setting , pneumonia can not be completely excluded . 2 . Stable mild cardiomegaly .