What is name for a type of xray that is not the normal xray, ct or mri that can also look at airpathways son has 1, 4 throat n can't recall name?

Pneumobronchogram?: I'm not sure what type of scan or film was taken without looking at it (if you have a picture, upload it onto HealthTap Prime & ask a doctor). Airways can be seen in rare instances (pneumonia, fluid in lungs, or other pathology) on an ordinary X-ray or CT. The FINDING is called an air bronchogram, but is not a separate technique. A V/Q scan (or V/Q scintigraphy) or Helium MRI can evaluate air flow