Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The right lower lobe opacity is less conspicuous on today 's exam . Otherwise , the overall radiographic appearance is similar to the prior exam . No new focal consolidation , pleural effusion , or pneumothorax . Stable linear platelike atelectasis in the left lower lung . Stable appearance of the cardiomediastinal silhouette and hila , with a prominent central pulmonary artery . Stable hyperinflation of the lungs with flattening of the diaphragms and increase in the anteroposterior diameter of the chest .
    OUTPUT:
    
Improved aeration at the right medial lung base . No signs of pneumonia .