Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The left PICC tip remains within the lower SVC . Tracheostomy tube is unchanged in position . Patient is status post median sternotomy , aortic and mitral valve replacement , and CABG . Moderate cardiomegaly persists , and diffuse atherosclerotic calcifications of the thoracic aorta are noted . Mediastinal contour is relatively unchanged with central venous vascular congestion . There is mild to moderate pulmonary edema , not substantially changed considering differences in positioning . Hazy opacification in the right lung is compatible with a layering right pleural effusion , likely small to moderate in size . There is likely a trace left pleural effusion as well . Patchy opacities in lung bases may reflect areas of atelectasis . No large pneumothorax is detected on this supine exam .
    OUTPUT:
    
Mild to moderate pulmonary edema , likely not substantially changed in the interval given differences in patient positioning . Small to moderate right and trace left pleural effusions . Bibasilar atelectasis .