Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs demonstrate reticular interstitial opacities bilaterally with indistinctness of the pulmonary vasculature , and peribronchial cuffing . In comparison to the prior radiograph from ___ there has been dramatic improvement in the degree of pulmonary edema , now mild to moderate . Retrocardiac opacification likely represents atelectasis , however infection is not excluded . The heart size is top - normal , improved from the prior study . No pleural effusion or pneumothorax . There is exuberant calcification of the aortic knob and descending thoracic aorta . Generalized bony demineralization is noted , particularly of the thoracic spine , with no acute fracture .
    OUTPUT:
    
1 . Since the prior radiograph from ___ , dramatic improvement in pulmonary edema which is now mild to moderate and associated with pulmonary vascular congestion but no pleural effusion . 2 . Retrocardiac opacification , likely representing atelectasis .