Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy and CABG . The heart remains moderately enlarged . The aorta is tortuous and diffusely calcified . There is mild pulmonary edema , improved compared to the prior exam . Small bilateral pleural effusions are present . No focal consolidation or pneumothorax is identified . Osseous structures are diffusely demineralized .
    OUTPUT:
    
Mild congestive heart failure , improved compared to prior study with small bilateral pleural effusions .