Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Moderate cardiomegaly is unchanged . Subtle interstitial changes are mildly increased from prior imaging . Atelectasis at the lung bases bilaterally is mild . The pulmonary vasculature is unremarkable . Aortic calcifications are dense . A small amount of pleural thickening or pleural fluid is seen at the right costophrenic angle .
    OUTPUT:
    
1 . Subtle increased interstitial changes could represent progression of mild interstitial lung disease , interstitial pneumonia or asymmetric edema . 2 . Aortic valve calcifications on prior CT were considerable and could be contributing to the patient 's symptoms .