Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared with prior exam , there has been interval slight worsening of bilateral interstitial opacities , with associated hilar engorgement and vascular upper redistribution . Bibasilar atelectasis is again seen . Elevation of the left hemidiaphragm is not significantly changed from prior , although there is some obscuration of the lateral left hemidiaphragm which may be due to overlying ateletasis and a small left pleural effusion . Cardiac contour can not be fully assessed due to partial obscuration of the left heart border , but is grossly stable . Mediastinum is stable in appearance . There is no pneumothorax . Patient is status post median sternotomy and CABG . An ill - defined hyperdensity between the fourth and fifth sternotomy wires is not clearly seen in the lateral view and may be external to the patient .
    OUTPUT:
    
1 . Findings suggest minimal interstitial edema . 2 . Stable elevated hemidiaphragm and bibasilar atelectasis . Possible small / trace left pleural effusion .