Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: In the left lower lobe , there is hazy opacification , which most likely is due to atelectasis , but early pneumonia can not be fully excluded . No other consolidations are noted . There is no evidence of pulmonary edema , pleural effusion , or pneumothorax . There is mild cardiomegaly . The mediastinal silhouette is normal .
    OUTPUT:
    
1 . Left lower lobe opacity is most likely atelectasis , although an early pneumonia can not be fully excluded . 2 . Stable mild cardiomegaly .