Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is mild - to - moderately enlarged . The mediastinal and hilar contours appear unchanged . There is similar moderate relative elevation of the left hemidiaphragm compared to the right . There is no definite pleural effusion or pneumothorax . There is a new widespread moderate interstitial abnormality with perihilar fullness , more extensive on the right than left , but suggestive of moderate interstitial pulmonary edema . This is superimposed on pre-existing right basilar opacities . Relative depression of the right acromion compared to the distal right clavicle appears unchanged and suggests a history of prior shoulder separation .
    OUTPUT:
    
New interstitial abnormality ; although asymmetric , most suggestive of pulmonary edema .