Yes they did a CT scan on me and that is when they found the hiatal hernia. I don't recall having a pulmonary function test done. It was quite a few years ago when those tests were done. I was hoping the hiatal hernia was what was causing the shortness of breath but it doesn't seem as though it made any difference. I have tried eating smaller meals. With my job, I have to walk paperwork to different departments and that is when I have problems with the breathing. Even getting out of the car will trigger the shortness of breath. I am just at the end of my rope dealing with this.