Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiograph with stable top normal size of cardiac silhouette . Pacemaker leads are positioned in the right atrium and ventricle and appear intact . A dense nodular opacity is noted in the left mid lung , unchanged compared to ___ and likely reflects granuloma . No opacification concerning for pneumonia identified . No pleural effusion or pneumothorax present .
    OUTPUT:
    
No acute intrathoracic process .