These days people go in for whole-body CT (computed tomography) scans to detect hidden diseases as a proactive health measure for normal and healthy people. CT scans can provide images with up to 20 times the detail of ordinary x-rays. A pencil thin beam of X-rays passed through the body produces cross sectional images from multiple angles, and when this is passed through a computer, the doctors can see three-dimensional image from any angle. How does a Cat Scan Machine Work Risks of Ra