Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest show decreased size of a left apical pneumothorax from the preceding radiograph of ___ . A left apical pleural pigtail catheter is unchanged in position . The lungs are otherwise clear and well aerated without focal consolidation or pleural effusion . The cardiomediastinal silhouette is normal .
    OUTPUT:
    
Decreased size of left apical pneumothorax from ___ at 14 :32 p .m .