Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable semi-upright radiograph of the chest demonstrates increased opacification of the bilateral bases extending to the mid lungs , consistent with pulmonary edema , but underlying infection can not be excluded . There are small bilateral pleural effusions which have increased slightly in size as compared to the prior study . There is no pneumothorax . The cardiomediastinal and hilar contours are unchanged .
    OUTPUT:
    
Findings consistent with pulmonary edema , but underlying infection can not be excluded . Recommend followup radiographs post - diuresis to evaluate for underlying infection .