Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable single frontal chest radiograph was obtained with the patient in upright position . A right chest tube has been inserted and loops downward from the apex with its tip projecting in the lower medial thorax . There is no pneumothorax . There is increased opacification at the left lung base , likely due to atelectasis . Multiple lung nodules seen on CT are not well visualized on the radiograph . The heart size is normal . Mediastinal contours are normal . There is no pleural effusion .
    OUTPUT:
    
Right chest tube in its appropriate position with no evidence of pneumothorax .