RT PROCH xray tube

Question 1

3 external structures of xray tube

Answer 1

→ support structure → protective housing → glass/metal envelope

Question 2

2 internal part of xray

Answer 2

Cathode (-) → anode (+)

Question 3

Serves as both electrical insulator and thermal cushion

Answer 3

Oil

Question 4

Provides mechanical support forthe xray tube

Answer 4

Protective housing

Question 5

Glass envelope is made up of

Answer 5

Pyrex glass

Question 6

Maintains a vacuum or empty space inside

Answer 6

Glass envelope

Question 7

Parts of cathode

Answer 7

FIFO

Filament → focusing cup

Question 8

Mm in diameter and cm long of filament

Answer 8

2 mm diameter and 1-2 cm long

Question 9

Filament is made up of what

Answer 9

Thoriated tungsten

Question 10

Melting point of thoriated tungsten

Answer 10

3 410°C

Question 11

Heat that the filament can with stand

Answer 11

2200°C

Question 12

Process of heating up filament or cathode to produce electron

Answer 12

Thermionic emission

Question 13

Metal cup where filament is embedded

Answer 13

Focusing cup

Question 14

Effectiveness of focusing cup is determined by its

Answer 14

→ size → shape → charge → filament size → position of filament

Question 15

Parts of an anode

Answer 15

FOTA focal spot →target

Question 16

Actual source of radiation

Answer 16

Focal spot

Question 17

Focal spot that is projected to the patient

Answer 17

Effective focal spot

Question 18

Attracts electrons

Answer 18

Target