Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . Mild calcifications of the aortic knob . Cardiomediastinal silhouette is unremarkable . There is increased fullness of the right hilum as compared the prior study along with subtly increased opacities at the right base . Lungs are clear . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
New fullness of the right hilum with adjacent right base opacities may represent atelectasis or pneumonia in the appropriate clinical circumstance .