Multiple choice

In CT scanning _____ are used.

  1. ultrasound waves

  2. gamma rays

  3. X-rays

  4. none of thes above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

CT (Computed Tomography) scanners use X-rays to create cross-sectional images of the body. Multiple X-ray measurements from different angles are processed by computer to generate detailed 3D images. Ultrasound uses sound waves, gamma rays are used in PET scans, and CT definitely uses X-rays, not 'none of these'.

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