Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: As compared to the prior examination , there is improved aeration bilaterally . However , there remains some hazy opacification , greater at the bases , likely representing pulmonary edema and predominantly a mild to moderate interstitial abnormality . No significant pleural effusion is present . A small amount of pleural fluid is noted along the right major fissure . No pneumothorax is seen . There is mild cardiomegaly .
    OUTPUT:
    
Mild to moderate predominantly interstitial opacification , less severe than before , but suggesting persistent or recurrent pulmonary abnormality ; although not specific , it could be seen with pulmonary edema among other causes .