Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are lower than prior , with multifocal opacities , most pronounced at the right and left base . Moderate cardiomegaly has increased , possibly secondary to lower lung volumes . No definite pleural effusion there is no pneumothorax . Median sternotomy wires are present .
    OUTPUT:
    
Multifocal airspace opacities most pronounced at the lung bases bilaterally , concerning for multifocal pneumonia with differentials including pulmonary edema .