Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest are compared to previous exam from ___ . The lungs remain hyperinflated . There is new opacity at the left lung base potentially due to infiltrate . Elsewhere the lungs remain clear . Cardiomediastinal silhouette is stable . There is no pleural effusion . Osseous and soft tissue structures are unchanged . No free air identified below the diaphragm .
    OUTPUT:
    
New opacity at the left lung base which could represent pneumonia in the proper clinical setting . Recommend repeat after treatment to document resolution .