Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest are provided demonstrating midline sternotomy wires , mediastinal clips , and prosthetic cardiac valve . There is slight elevation of the right hemidiaphragm which is stable . The heart remains top normal in size with interval development of mild interstitial edema . The hilar vasculature is congested . No pneumothorax . Tiny right pleural effusion noted . No clear signs of pneumonia . Bony structures are intact . Degenerative spurring along the inferior right glenohumeral joint again noted .
    OUTPUT:
    
Mild interstitial edema , new from prior exam . No convincing signs of pneumonia .