Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A single AP portable radiograph was acquired . Small calcified densities overlying both mid lungs relate to partially calcified pleural plaques as seen on chest CT from ___ . The lungs are clear . Heart size is top normal . The mediastinal contours are normal . There are no pleural effusions . No pneumothorax . A left pacemaker is seen with right atrial and right ventricular leads , not significantly changed in position compared to radiographs from ___ . The patient is status post midline sternotomy and CABG , as before .
    OUTPUT:
    
No acute cardiac or pulmonary process .