Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is mildly enlarged . The aorta remains tortuous and diffusely calcified . Mild pulmonary vascular congestion is present , however this is improved compared to the previous radiograph . There is mild elevation of the right hemidiaphragm , unchanged , with no focal consolidation , pleural effusion or pneumothorax identified . No acute osseous abnormalities seen . A vascular stent is noted within the region of the left axillary and subclavian vessels .
    OUTPUT:
    
Mild pulmonary vascular congestion , improved from the previous study .