Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Linear opacities present in the left lower lobe representing atelecatsis are grossly unchanged from the ___ exam . Otherwise , the lungs are clear . Cardiomediastinal silhouette and hilar contours are unremarkable . There is no pleural effusion or pneumothorax . The patient is status post right hemi-arthroplasty of the shoulder .
    OUTPUT:
    
Continued linear opacities in the left lower lobe , unchanged since ___ likely atelecatsis . Resolution of the previously opacity concerning for pneumonia .