Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left - sided AICD device is re - demonstrated with leads in the right atrium and right ventricle , unchanged . Heart size is mildly enlarged . Mediastinal and hilar contours are unremarkable . Lung volumes are low with minimal retrocardiac atelectasis noted . No pleural effusion , pulmonary edema or pneumothorax is seen . There are no acute osseous abnormalities .
    OUTPUT:
    
No acute cardiopulmonary process . Unchanged position of the AICD leads .