Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is moderate pulmonary vascular congestion bilaterally , slightly worse in the lower lung zones . There is mild interstitial edema . There is no focal consolidation , effusion , or pneumothorax . Cardiomegaly is not significantly changed since prior , allowing for differences in positioning . The lower left heart border is obscured , as on prior . Imaged osseous structures are intact . No free air below the right hemidiaphragm is seen . Right PICC tip , sternal wires , prosthetic heart valve , and aortic arch calcifications appear similar compared to prior .
    OUTPUT:
    
Moderate pulmonary vascular congestion bilaterally , slightly worse in the lower lung zones , with mild interstitial edema .