In order to have a CT scan you will have to slide in and out the donut hole. In this case, the donut hole is pretty large, and the donut itself isn't too thick, so the whole thing seems more open. Although it may be a hassle to feed all the IV, monitor, and other lines through, it still is a pretty open affair. There are intensely claustrophobic patients who cannot get through a CT scan. In the vast majority of cases, professional care will eliminate patient fear.
Some departments use the additional benefits of sedation.
What is scary about having a CT scan is watching the doctors huddled over pictures of your insides not knowing what they are seeing or what is going on. Doctors sometimes get carried away with their science, so speak up and ask your doctor questions about what is going on. It may seem impossible to tolerate. They want you to squeeze yourself into a skintight steel tube with no give. You cannot move an inch and you can barely breathe.