Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a dual lead pacemaker / ICD device in place . Cardiac , mediastinal and hilar contours appear unchanged . There are new small pleural effusions and a diffuse mild new interstitial abnormality suggesting mild interstitial pulmonary edema . Opacities at the left lung base appear increased but were present before and may be due to waxing and waning chronic atelectasis ; active infectious process is not excluded , however .
    OUTPUT:
    
Findings suggest new mild interstitial pulmonary edema including small bilateral pleural effusions . Persistent , somewhat increased left lower lobe opacification , probably consistent with waxing and waning atelectasis although a superimposed infectious process is hard to entirely exclude .