Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A right pigtail drain is seen at the base of the right lung , unchanged in position . A left central venous catheter is seen terminating in the low SVC and unchanged . There is some opacity at the base of the right lung which likely represents increased atelectasis , however may also represent pneumonia or pulmonary hemorrhage in the appropriate clinical setting . There is possibly a new loculated right pleural effusion . There is a small pleural effusion on the left . The cardiomediastinal silhouette and hilar contours are grossly unchanged . There is no pneumothorax .
    OUTPUT:
    
Opacity at the base of the right lung which likely represents increased atelectasis , however may also represent pneumonia or pulmonary hemorrhage in the appropriate clinical setting .