Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild enlargement of cardiac silhouette is unchanged . The aorta is tortuous , unchanged . Mediastinal and hilar contours are similar . Mild pulmonary vascular congestion has slightly improved in the interval . Minimal atelectasis is seen in the left lung base . No pleural effusion or pneumothorax is present . There is diffuse demineralization of the osseous structures with evidence of prior vertebroplasty in a low thoracic vertebral body .
    OUTPUT:
    
Mild left basilar atelectasis . Interval improvement in previously noted mild pulmonary vascular congestion .