Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP single view of the chest has been obtained with patient in supine position . Comparison is made with a previous similar examination of ___ , which also was performed with the patient in supine position . Moderate cardiac enlargement as before . Heart size may have increased slightly . However , portable technique in supine position does not allow precise assessment . Comparison with the next previous study clearly identifies a new parenchymal density in the left hemithorax in perihilar position extending into the left upper lobe . The previously identified left lower lobe linear densities suspicious for atelectasis persist . No new pulmonary abnormalities in the right hemithorax and no pneumothorax identified on either side . The patient is intubated and the ETT terminates in the trachea some 5 cm above the level of the carina .
    OUTPUT:
    
New parenchymal infiltrates in mid and left upper lung field . As patient apparently was in supine position during the last ten days , consider possibility of aspiration pneumonitis in this unusual location .