Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest show a left pectoral dual - lead pacemaker with two leads terminating in the right ventricle and left ventricle , unchanged . A right - sided PICC line has been slightly withdrawn since ___ , with the tip now terminating at the confluence of the brachiocephalic vein which should be advanced 6 cm to place in the low SVC . Mild pulmonary edema is improved and nearly resolved from ___ . Opacification at the right medial lung base on the frontal radiograph and posterior lower lung on the corresponding lateral radiograph is consistent with right lower lobe atelectasis . No pleural effusion or pneumothorax is present . The cardiomediastinal silhouette is unchanged with mild cardiomegaly . Calcification of the mitral valve annulus is noted . There is generalized loss of vertebral height and severe degenerative changes with bridging osteophyte formation in the thoracic spine .
    OUTPUT:
    
1 . Right lower lobe atelectasis . 2 . Improved and nearly resolved mild pulmonary edema ___ . 3 . Right PICC line with tip slightly withdrawn , at the confluence of the brachiocephalic veins , needs to be advanced 6 cm to place in the low SVC . 4 . Stable cardiomegaly .