Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest are compared to prior from ___ . When compared to prior , again seen is a right upper lobe infiltrate which may have partially improved since prior . There is , however , slightly more conspicuous opacity on the lateral view in the retrocardiac clear space and overlying the spine , potentially localizing to the left . Elsewhere , the lungs are clear . Cardiomediastinal silhouette is stable as are the osseous and soft tissue structures .
    OUTPUT:
    
Perhaps slightly improved opacity at the right lung apex suspicious for pneumonia . Slightly more conspicuous opacity at the lung base likely on the left , potentially new infiltrate . Continued followup is suggested to document resolution after treatment .