Radiology - Production of x-rays

Question 1

Characteristics of cathode filament…

Answer 1

Fine wire made of tungsten. Electrons gets excited giving off light

Question 2

Characteristics of anode filament…

Answer 2

Small tungsten. High energy electron come to stop and energy form changes

Question 3

Types of x-ray spectra?

Answer 3

2 types.

i) continuous spectrum
ii) characteristic spectrum

Question 4

Characteristics of continuous spectrum…

Answer 4

Wide range of photon energies. Small deflection are common

Question 5

Characters of characteristics spectrum…

Answer 5

Line spectra relating to K & L shells

Question 6

Define scattering

Answer 6

Random change in direction after hitting something

Question 7

Define absorption

Answer 7

Deposition of energy in tissues

Question 8

Define intensity

Answer 8

Number of x-ray photons in a defined area of the beam

Question 9

Define attenuation

Answer 9

Reduction in intensity of beam due to scattering and absorption

Question 10

Define ionisation

Answer 10

Removal of electron from neutral atoms to give negative and positive ions

Question 11

Define penetration

Answer 11

Ability of photons to pass through/into tissues/materials

Question 12

Interactions of x-ray

Answer 12

scattered with no loss of energy and absorption loss of energy

Question 13

Properties of x-rays

Answer 13

Causes ionisation, travel straight, scatter, absorption, penetrate matter.

Question 14

What is radiation dose?

Answer 14

Amount of radiation absorbed by patient

Question 15

Electromagnetic radiation

Answer 15

Divided into ionising and non ionising radiation, depends on wavelength, may be harmful to living tissues.