Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: As before , the patient is status post midline sternotomy and aortic valve replacement . A trace right pleural effusion is substantially decreased compared to the prior study from ___ . A previously seen small left pleural effusion has resolved . There is bilateral lower lung atelectasis . Linear atelectasis versus fissural fluid is seen at the right lung base . There is mild cephalization without frank interstitial pulmonary edema . Moderate cardiomegaly is not significantly changed . The mediastinal contours are normal . There is no pneumothorax . Elevation of the right hemidiaphragm is not significantly changed .
    OUTPUT:
    
1 . Pulmonary vascular congestion without frank interstitial edema . 2 . Unchanged moderate cardiomegaly . 3 . Trace right pleural effusion , decreased in size compared to the prior study from ___ . Interval resolution of small left pleural effusion . 4 . Unchanged elevation of the right hemidiaphragm .