Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A prosthetic valve and median sternotomy wires are again noted . The aortic knob is calcified . Motion limits evaluation of the film . Left lower lobe linear opacities are unchanged and likely represent atelectasis . There are patchy new alveolar infiltrates bilaterally . There is prominent pulmonary vasculature . small left pleural effusion .
    OUTPUT:
    
Fluid overlad . New opacities in the correct clinical setting could represent pneumonia or could be due to CHF .