Using X-rays

Question 1

explain the inverse law

Answer 1

area increases with the square of distance so intensity decreases with the square of distance.

Question 2

Relate the absorption of X-rays to the thickness of the material through which they are travelling

Answer 2

increase the thickness of materials increases the x-rays absorbed

Question 3

Describe how X-rays are used in CAT scans

Answer 3

an x-ray source is used to produce a 3 dimensional image of the internal structure of a patient

Question 4

Describe how X-rays are used in fluoroscopes

Answer 4

use x-ray images on a screen. these allow doctors to see a real-time image of a patients internal condition

Question 5

describe the advantages of using X-rays for treatment

Answer 5

> can help to give a reliable diagnosis and make sure treatment is fast and accurate
x-rays are non-invasive. this means that the patient doesn’t have to have an operation to see what s happening

Question 6

describe the risks of using X-rays for treatment

Answer 6

> x-rays can kill and damage living cells

> risks are greater for babies and young children, so exposure is kept to a minimum