They let you go home straightaway, too, didn't they? I had to fast for three hours before my appointment even though it was a non-contrast scan. When I grumbled about being hungry, the tech told me that they like to have their head CT patients ready for contrast in case something comes up and they need to run additional images. When I skedaddled out of there without needing contrast, I figured the initial scans must have looked fairly normal. Of course, a radiologist will need to interpret them but I'm still cautiously optimistic and honestly, you should be too if you got to leave quickly and still haven't heard back. We'll just hang in there until we know for sure.