Imaging with Electromagnetic Waves

Question 1

How are Infrared Waves used for Medical Imaging?

Answer 1

Thermal Imaging Camera produces image called Thermogram
Thermogram shows regions of different temperatures
Skin emits more radiation if it’s hot due to injury/infection

Question 2

What is a Charge Coupled Device (CCD)?

Answer 2

Device made of pixels that detects electromagnetic radiation eg. phone camera

Question 3

How are X-Rays used for Imaging?

Answer 3

Bones absorb many X-Rays but soft tissue doesn’t

Film darkens when it absorbs X-Rays showing the internal structure of a person

Question 4

What is Computerised Tomography?

Answer 4

A process of producing an image of the inside of the body using a series of X-Ray Images and a Computer
Produces CT Scans

Question 5

How are Gamma Rays used for Imaging?

Answer 5

Used as tracers
Doctor injects patient with tracer
Patients kidneys absorb tracer
Doctor diagnoses problems CCD images

Question 6

What is a Tracer?

Answer 6

A radioactive substance that emits Gamma Rays