Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable single frontal chest radiograph was obtained with the patient in a semi upright position . Lung volumes remain very low . There is increased right interstitial edema when compared to prior study . The opacity at the right lung base is unchanged , and may represent bronchovascular crowding . There is no pleural effusion or pneumothorax . The cardio mediastinal silhouette is unchanged . Large amount of intraperitoneal gas is again visualized and confirmed by CT performed today .
    OUTPUT:
    
1 . Increased right sided pulmonary edema . 2 . Large amount of free intraperitoneal gas remains .