Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: NG tube is seen with tip in the fundus of the stomach and side port at the level of the GE junction . ET tube is in appropriate position with tip 3 cm above the level of the carina . The lungs are well expanded . Linear opacity in the left lower lobe likely represents atelectasis , however , may represent aspiration pneumonia in the appropriate clinical setting . The right pleural surface is clear . The left costophrenic angle is not fully imaged ; however , no large pleural effusion seen . No pneumothorax . Mildly enlarged heart is likely attributed to AP technique and supine positioning . Mediastinal contour and hila are normal . Medialization of aortic arch calcifications without irregularity of the aortic knob contour or apical cap is of unclear significance .
    OUTPUT:
    
1 . Consider advancing NG tube 3 cm for better seating in the stomach . 2 . ET tube in appropriate position . 3 . Medialization of the aortic arch calcifications may be positional in nature ; however , if clinical concern for aortic pathology further evaluation with CT may be helpful . 4 . Left lower lobe linear opacity is likely atelectasis , however , may represent aspiration in the appropriate clinical setting .