Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate linear atelectasis in the left lower lung . The heart size is moderately enlarged , the aortic contour is prominent . There is an indistinct quality to the pulmonary vasculature . No focal consolidation is seen , there are no pleural effusions nor pneumothorax .
    OUTPUT:
    
Mild interstitial pulmonary edema with moderate cardiac enlargement . The aortic contour is prominent , which may be the result of tortuosity , however enlargement is not excluded on this study .