Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal and hilar contours are stable , with moderate cardiomegaly and a tortuous thoracic aorta . Mild pulmonary edema is minimally worse since the prior study . The lung volumes are low , with bibasilar atelectasis . A moderate - sized left pleural effusion is unchanged .
    OUTPUT:
    
Mild worsening of the pulmonary edema , with bibasilar atelectasis . No definite evidence of pneumonia .