Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared with prior radiographs on ___ , there is increased aeration of bilateral lung bases . There is no focal consolidation . There is no effusion or vascular congestion . No pneumothorax . Mild cardiomegaly , unchanged . Tortuous aorta and prominent innominate artery , similar to prior . Severe scoliosis , unchanged .
    OUTPUT:
    
Increased aeration at the bilateral lung bases . No pneumonia .