Having a CT Scan: Page 3 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 Before your scan you will need to drink a special juice called "contrast." Contrast will help the pictures turn out clear so your doctors can see everything they need to see. You will either drink this special juice or it might be given to you through an IV. You will need to drink a whole glass of contrast. It may taste like fruit punch.