Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Study is limited by body habitus . Lung volumes are low , accentuating the cardiac silhouette and pulmonary vasculature . Given low lung volumes , heart size is only mildly enlarged . Previous mild pulmonary edema and mediastinal venous engorgement have resolved , although pulmonary vascular congestion persists . Lungs are otherwise clear . Thoracic aorta is mildly tortuous . Hilar contours are unremarkable . Plate - like atelectasis at the right lung base persists . Pleural surfaces are clear without effusion or pneumothorax .
    OUTPUT:
    
Mild heart failure improved since ___ . Mild atelectasis .