Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single frontal view of the chest was obtained . Moderate cardiomegaly is similar to ___ . Left brachiocephalic and SVC vascular stents are in similar position to prior . There is calcification of the aortic knob . The pulmonary vascular markings are indistinct , compatible with congestion . There is a vague right lower lobe opacity , which likely represents mild atelectasis . No large pleural effusion is noted . No pneumothorax . Osseous structures appear unremarkable .
    OUTPUT:
    
Mild pulmonary congestion .