CT has become an important tool in medical imaging to supplement X-rays and medical ultrasonography. It has more recently been used for preventive medicine or screening for disease, for example CT colonography for patients with a high risk of colon cancer, or full-motion heart scans for patients with high risk of heart disease.
CT scanning, which stands for Computer Assisted Tomography, is a rapid, painless diagnostic examination that combines X-rays and computers to image the inside of the body at far more detail than standard X-rays. [
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The CT Scanner is shaped like a large donut and the inside rotates around taking images of the body. Each time the machine rotates it takes an image of one slice of the body.