Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Bilateral , predominantly dependent opacities with air bronchograms reflect edema , mild to moderate , but improved from the prior exam . Concurrent infectious process can not be excluded in the appropriate clinical situation , particularly in right lower lobe . Mild central pulmonary vascular congestion is similar the prior exam . No pleural effusion . Mild cardiomegaly is unchanged . Aortic knob calcifications are mild , unchanged . Dual lead cardiac pacing may care device appears intact and unchanged in position . Slight elevation in eventration of the right hemidiaphragm overall similar .
    OUTPUT:
    
Persistent mild - to - moderate edema in the setting of mild cardiomegaly , overall improved since ___ with concurrent pneumonia , predominantly in right lower lobe .