X Rays in Medicine

HideShow resource information
  • Created by: EllieR15
  • Created on: 19-02-15 14:32
Why are x-rays used in hospitals?
For medical diagnosis
1 of 11
What is the frequency and wavelength of an x-ray?
High frequency, short wavelength electromagnetic waves
2 of 11
How are x-rays transmitted? What are x-rays absorbed by?
Transmitted by (pass through) healthy tissue. Absorbed by denser materials such as bones and metal.
3 of 11
X-ray photographs can be used to diagnose what?
Bone fractures and dental problems.
4 of 11
How can x-rays be formed electronically?
Can be formed electronically using charge-coupled devices (CCDs)
5 of 11
What are charge-coupled devices?
Silicon chips about the size of a postage stamp, divided up into a grid of millions of identical pixels. They detect x-rays and produce electronic signals which are used to form high resolution images. The same technology is used in digital cameras.
6 of 11
What are CT Scans?
Computerised axial tomography (CT) scans use x-rays to produce high resolution images of soft and hard tissue.
7 of 11
Why do CT scans use lots of x-rays (more than normal x-ray photographs)?
To distinguish between the tiny variations in tissue density.
8 of 11
X-rays can also be used to treat what?
Cancer
9 of 11
X-rays can cause ionisation. What is this?
High does of x-rays which will kill living cells. This will help treat cancer. However, x-rays have to be carefully focused and at just the right dosage to kill the cancer cells without damaging too many healthy cells.
10 of 11
Radiographers who work with x-ray machines or CT scanners need to take precautions to minimise their x-ray dose. How do they do this?
They wear lead aprons, stand behind a lead screen, or leave the room.
11 of 11

Other cards in this set

Card 2

Front

What is the frequency and wavelength of an x-ray?

Back

High frequency, short wavelength electromagnetic waves

Card 3

Front

How are x-rays transmitted? What are x-rays absorbed by?

Back

Preview of the front of card 3

Card 4

Front

X-ray photographs can be used to diagnose what?

Back

Preview of the front of card 4

Card 5

Front

How can x-rays be formed electronically?

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar Physics resources:

See all Physics resources »See all X Rays in Medicine resources »