Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is at the upper limits of normal . The mediastinal contours demonstrate mildly tortuous aorta with atherosclerotic disease at the aortic knob . The hilar contours are within normal limits . The lungs demonstrate irregular patches of haziness without clear lobar consolidation . There is no large pleural effusion or pneumothorax .
    OUTPUT:
    
Mild cardiomegaly and vascular congestion but no evidence of pneumonia .