Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are diffuse interstitial opacities which are new since the prior examination . Though likely due to interstitial pulmonary edema given evidence of prior cardiac surgery , there is no evidence of central venous engorgement , cardiomegaly or pleural effusions . An alternative possibility would be atypical infection in the appropriate clinical circumstance . No confluent consolidation is identified . There is no pneumothorax . Mediastinal and hilar contours are within normal limits and unchanged from prior . Mild cardiomegaly is stable . Post - surgical changes from prior CABG are unchanged . Median sternotomy wires appear grossly intact .
    OUTPUT:
    
New diffuse interstitial opacities likely related to pulmonary edema , though atypical infection should also be considered .