Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left lower lobe opacity has improved but not resolved since ___ . Mediastinal contour , hila , and cardiac silhouette are normal . Small right pleural effusion is unchanged from ___ . No evidence of acute fracture within the limits plain radiography .
    OUTPUT:
    
1 . Improved but not resolved left lower lobe pneumonia , as expected given time since initiation of treatment . Repeat chest radiograph in 4 weeks documenting radiographic resolution is recommended . 2 . Small right pleural effusion stable from ___ . 3 . No evidence of traumatic injury within the limits plain radiography .