Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable AP view of the chest was provided . Hazy opacity at the right lung base may represent atelectasis ; however , infectious process can not be entirely excluded . The left lung is clear . There is no pleural effusion or pneumothorax . Cardiomediastinal silhouette is unremarkable . There are no acute skeletal abnormalities .
    OUTPUT:
    
Hazy opacity at the right base may represent atelectasis ; however , infectious process can not be excluded .