Medical Imaging Exam Questions with 100% Correct Answers

Medical Imaging Exam Questions with 100%
Correct Answers
Which medical imaging method does NOT use electromagnetic radiation?

Ultrasound

What type of energy do X-rays use?

X-rays

What type of energy do CT scans use?

X-rays

What type of energy do Radioactive tracers use?

Gamma radiation

What type of energy does an Ultrasound use?

High frequency sound waves

What type of energy is used by MRI scans?

Radio waves

Define X-rays.

X-rays are electromagnetic waves which have extremely short wavelengths. They are

generated by aiming high energy electrons at a tungsten target. Detection is usually done with

a photographic film.

What stops X-rays?

Lead

, What are the uses of X-rays?

-Broken bones

-Dental decay

- Lungs (to see damaged tissue and fluid build up)

-Narrowing of the coronary artery using x-ray opaque dye

-Disease of the digestive tract using a barium meal

What are the advantages of X-rays?

-Relatively cheap and easy

-Good bone resolution

-Can be interpreted by a non-radiologist

What are the disadvantages of X-rays?

-Poor soft tissue resolution

-Ionising radiation is harmful/ increased cancer risk

-High voltage supply hazardous

- Only 2D image

Define CT scans.

CT stands for computed axial tomography. CT scans collect data and computers then make a

3D image.

What are the advantages of CT scans?

Produces detailed images.

More available in the UK than the MRI.

What are the disadvantages of CT scans?