Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . A dual chamber intracardiac device leads end in the expected locations of the right atrium and right ventricle . There is no focal consolidation , pleural effusion or pneumothorax . The patient is status post sternotomy and valve replacement . Cardiac and mediastinal silhouettes are unchanged . Mild bibasilar opacities are similar to the prior study , which may represent mild chronic lung disease . There is no pleural effusion or pneumothorax . No acute osseous abnormality is identified . There is no free air under the diaphragm .
    OUTPUT:
    
No acute intrathoracic process . No change from ___ .