Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are low . No focal consolidation , pleural effusion , pneumothorax , or pulmonary edema is detected . Mild cardiomegaly is again noted . The aorta is calcified , as seen previously . A nodular opacity projects over the anterior third rib , unchanged from prior .
    OUTPUT:
    
1 . No radiographic evidence for pneumonia . 2 . Stable nodular opacity projecting over the right anterior third rib , which could represent a small amount of loculated fluid or fibrotic change from prior pneumonia .