Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Increased interstitial markings are seen predominantly centrally . There is no confluent consolidation or layering effusion . There is suggestion of fluid within the fissure . The cardiac silhouette is mildly enlarged . No acute osseous abnormality is identified .
    OUTPUT:
    
Cardiomegaly and interstitial edema .