Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP single view of the chest has been obtained with patient in sitting semi-upright position . Comparison is made with the next preceding similar study dated ___ . On the single AP frontal view , there is no evidence of any pneumonic infiltrates . Heart size is unchanged and within normal limits . No pneumothorax in the apical area . A previously described Dobbhoff line has been advanced further and one notices that the line makes a 360 - degree loop in the proximal esophagus at the level of the clavicles . The Dobbhoff line itself has advanced further and its tip exceeds the lower limit of the present image .
    OUTPUT:
    
No evidence of pneumonia . Adjustment of the unusual loop of the NG tube is recommended as it may give discomfort to the patient . Referring physician , ___ , was paged .