Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: An increased right lower lobe airspace opacity is most likely due to aspiration given its rapid improvement on the subsequent chest CT . Asymmetric pleural thickening , right greater than left , is present . There is no pneumothorax or pleural effusion . The heart and mediastinum are within normal limits .
    OUTPUT:
    
Right lower lobe aspiration is favored over pneumonia given the rapid improvement on subsequent chest CT .