Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Increased interstitial markings are seen bilaterally , more prominent on the prior study , suggesting moderate interstitial edema . No pleural effusion is seen . There is no evidence of pneumothorax . The cardiac and mediastinal silhouettes are grossly stable given differences in patient position . A stent is again seen projecting adjacent to the level of the aortic knob . The bones are diffusely osteopenic .
    OUTPUT:
    
Moderate interstitial edema .