Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is stable elevation of the left hemidiaphragm with adjacent platelike atelectasis and / or scarring at the left lung base . The cardiomediastinal silhouette and pulmonary vasculature are stable since the prior exam . Again seen is a dual lead pacemaker , with expected position of the leads . No focal consolidation is identified . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
No acute intrathoracic abnormality .