Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well expanded . Moderate pulmonary edema is new , with left lower lobe airspace opacity which obscures the left hemidiaphragm . Cardiomegaly is moderate to severe . Aortic arch calcifications are mild . Small bilateral pleural effusions are present . No pneumothorax is detected .
    OUTPUT:
    
Moderate CHF with small bilateral pleural effusions and probable left basilar atelectasis , but infection is not excluded .