Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP single view of the chest has been obtained with patient in semi-upright position . Analysis is performed in direct comparison with the next preceding similar study of ___ . Drooping head and chin are obscuring apical portion of the lungs and makes it impossible to accurately inspect the superior trachea . It is assumed that the ETT present on the previous examination has been removed . No pneumothorax can be identified . The pulmonary vasculature is unaltered and there is no evidence of any new acute parenchymal infiltrate . Similar as on the preceding examination , the high positioned diaphragms result in crowded appearance of the basal pulmonary vasculature with some linear densities on the left base most likely representing plate atelectasis . The diaphragmatic contours can be identified and thus there is no evidence of significant pleural effusion on either side . Smaller amounts of pleural effusion would require a lateral view to be seen in the posterior dependent pleural sinuses . Cardiac enlargement of moderate degree is again seen and within the heart shadow , one can identify a band of calcium representing mitral annulus calcifications .
    OUTPUT:
    
No evidence of acute pneumonia on this portable chest examination .