Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable supine frontal chest radiographs demonstrate left chest wall pacing device with leads overlying the right atrium and ventricle , sternal wires , and mediastinal surgical clips , grossly unchanged in position . Surgical clips also project over the lower right neck . The endotracheal tube terminates within the mid thoracic trachea . The cardiomediastinal silhouette is normal . The lungs are fairly well aerated , with a persistent retrocardiac opacity silhouetting the medial hemidiaphragm . Hazy bibasilar opacities may represent layering effusions and or atelectasis
    OUTPUT:
    
1 . Endotracheal tube terminating in the mid thoracic trachea . 2 . Unchanged persistent retrocardiac opacity , which could represent atelectasis or infiltrate . 3 . Possible layering effusions and or atelectasis .