As you know from this article a normal TSH range depending on the lab is around 0.5 to 5.0 which is why your TSH of 4.46 was determined normal, however the very fact that your first TSH test showed up 6.49 should be reason to investigate further.
Liver Ultrasound Preparation guidelines. 1  Do not drink or eat at least 6 hours before the test. 2  On the day before the test, do not eat â fresh fruits and vegetables, fried and oily food, milk, eggs, bread. 3  What you should eat â cooked vegetables, puree, marmalade, honey, roasted bread, soup, and rice.
My PET scan instructions were for a low carb diet beginning at dinner the night before the scan, and I was to have NO food or drink for 4 hours before the scan. Also, no strenuous exercise or accupuncture for 12 hours prior to the scan. You can have a small amount of water in the 4 hours before the scan. Make sure you don't wear clothing with zippers or other metal (I wore sweats).