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 . Analysis is performed in direct comparison with the next preceding similar study of ___ . On the single AP view chest examination , the heart size remains unchanged and is within normal limits . The pulmonary vasculature is not congested . No signs of acute new infiltrates in comparison with the previous study obtained four days earlier . No evidence of pleural effusion as the lateral pleural sinuses are free . A previously existing right internal jugular approach central venous line has been removed . There is no evidence of pneumothorax in the apical area .
    OUTPUT:
    
No evidence of pneumonia .