Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Exam is limited secondary to portable technique and patient body habitus . There is some evidence of interstitial edema as on prior . No definite new confluent consolidation identified . Pleural effusions are difficult to exclude . Cardial silhouette is enlarged but similar compared to prior . Prosthetic aortic valve is noted as well as anterior chest wall hardware .
    OUTPUT:
    
Limited exam with probable interstitial edema .