Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left lower lobe consolidation is likely atelectasis , slightly improved from prior . The lungs are otherwise clear . The left pleural effusion is slightly smaller . The small left apical pneumothorax is approximately unchanged . The cardiomediastinal silhouette is unchanged .
    OUTPUT:
    
Unchanged small apical pneumothorax . Left pleural effusion and left lower lobe atelectasis have improved slightly . No other acute cardiopulmonary process .