Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are somewhat decreased , similar to prior studies . There is no focal consolidation , effusion , or pneumothorax . There is possible central vascular congestion without overt pulmonary edema . Median sternotomy wires , mediastinal clips and coronary artery stents are present . Moderate cardiomegaly is unchanged .
    OUTPUT:
    
Cardiomegaly with possible hilar congestion . No frank edema or pneumonia .