Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: As on the prior studies , there is some obscuration of left hemidiaphragm on the frontal view , seen dating back to at least ___ . The cardiac and mediastinal silhouettes are stable since that time . No pulmonary edema is seen . No large pleural effusion or pneumothorax is identified . No focal consolidation is seen .
    OUTPUT:
    
No significant interval change .