Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette size appears mild to moderately enlarged as seen previously . The aorta is unfolded with atherosclerotic calcifications noted in the descending thoracic aorta . Lung volumes are lower compared to the previous study . Enlarged on the hila is again noted bilaterally . Mild interstitial pulmonary edema is worse in the interval , with increased patchy bibasilar opacities likely reflective of atelectasis . No pleural effusion or pneumothorax is clearly identified . No acute osseous abnormality seen . A rounded radiopaque dense structure measuring 2 cm projects over the epigastric region .
    OUTPUT:
    
Mild interstitial pulmonary edema , worse in the interval , with patchy bibasilar opacities , likely atelectasis .