Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Moderate size left hydropneumothorax appears relatively unchanged accounting for differences in technique compared to the previous CT . No contralateral shift of the mediastinal structures is present indicate tension . There is associated atelectasis of the left lung . Heart size is normal . Mediastinal and hilar contours are normal . Right lung is clear . No acute osseous abnormality is detected .
    OUTPUT:
    
No substantial interval change in moderate - sized left hydropneumothorax compared to the recent CT .