Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is at the upper limits of normal os slightly enlarged , increase in size compared to prior exam . The mediastinal contours demonstrate calcified atherosclerotic disease of the aortic knob , similar to prior exam . Perihilar opacities are present as well as an engorged appearance of the pulmonary vasculature and interstitial edema . No definite large pleural effusion is present , and there is no pneumothorax .
    OUTPUT:
    
Cardiomegaly and pulmonary edema , concerning for heart failure .