Not always. It is much harder to detect smaller lesions on non-contrast head ct, but large tumors causing swelling or pressure on other parts of the brain can usually be detected. Usually brain MRI with contrast is more sensitive and gives me a more detailed picture when I am trying to evaluate for brain tumors.
Yes. Contrast dye helps to show the vascularity and fluid areas however a normal ct will show tumors and areas of infection.
No. You are no more risk for brain tumor now than you were before you had the CAT scan. For good health - Have a diet rich in fresh vegetables, fruits, whole grains, milk and milk products, nuts, beans, legumes, lentils and small amounts of lean meats. Avoid saturated fats. Exercise at least 150 minutes/week and increase the intensity of exercise gradually. Do not use tobacco, alcohol, weed or street drugs in any form. Drink enough water daily so that your urine is mostly colorless. Practice safe sex. Get HPV vaccine. Read more...