Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The inspiratory lung volumes are decreased from the most recent prior study . The pulmonary vasculature is indistinct with new patchy opacification , predominantly in the bilateral lung bases , which likely reflect a combination of subsegmental atelectasis and mild to moderate pulmonary edema . There is increased retrocardiac opacification . Small pleural effusions can not be excluded . No pneumothorax is detected . The cardiac silhouette is moderately enlarged but unchanged . The mediastinal contours are within normal limits . Note is again made of calcification at the aortic knob . An ovoid metallic object again projects at the right lung base along the right cardiac border , unchanged from the prior study . A metallic coil is noted in the periphery of the right lung base , which is also stable .
    OUTPUT:
    
1 . Mild to moderate pulmonary edema , increased from ___ . 2 . Increased retrocardiac opacification could represent atelectasis ; however , superimposed infection can not be excluded in the appropriate clinical context .