Which of the following types is used by computed tomography employed for visualization of the internal structure of human body?

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Q: 139 (IAS/2007)
Which of the following types is used by computed tomography employed for visualization of the internal structure of human body?

question_subject: 

Science

question_exam: 

IAS

stats: 

0,22,28,22,4,22,2

keywords: 

{'tomography': [0, 0, 1, 0], 'internal structure': [0, 0, 1, 2], 'radioisotopes': [0, 0, 2, 0], 'magnetic resonance': [0, 0, 1, 1], 'visualization': [0, 0, 1, 0], 'human body': [40, 2, 44, 29], 'types': [11, 3, 20, 23], 'sound waves': [0, 0, 2, 9]}

Alert - correct answer should be 1

Computed Tomography, commonly known as CT or CAT scan, uses X-rays to image the internal structures of the body. Let`s break each option down:

Option 1: X-rays are used in a CT scan. The machine rotates around the body and sends out multiple X-rays, creating cross-sectional images of the body which can be compiled to give a highly detailed 3D image.

Option 2: Sound waves are not used in CT Scans, but rather in an Ultrasound, which uses high-frequency sound waves to capture live images from the inside of your body.

Option 3: Magnetic Resonance is the basis for MRI (Magnetic Resonance Imaging), not a CT scan. It uses a strong magnetic field and radio waves to create detailed images of the organs and tissues.

Option 4: Radioisotopes are used in a different type of scanning called a PET scan (Positron Emission Tomography), which involves injecting small amounts of radioactive material into the body.

Therefore, the correct answer should be option 1 - X-rays.