Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy and CABG . The aorta is moderately calcified as before . Multifocal bilateral opacities are minimally increased from the prior examination consistent with moderate , pulmonary edema . There is increased opacity at the right base seen laterally . Lung volumes are markedly low . There is no pneumothorax or large pleural effusion .
    OUTPUT:
    
Low lung volumes . Moderate pulmonary edema . Increased opacity at the right lung base - underlying infection should be considered in the appropriate setting .