linear accelerator components

Question 1

electron gun

Answer 1

supplies electrons needed for xray production an injects them into the accelerator guide

Question 2

supplies RF power for the accelerator guide,

Answer 2

magnetron/klystron

Question 3

transports RT power from the magnetron to the accelerator guide

Answer 3

waveguide

Question 4

one way door int he wave guide that allows RF into the accelerator guide but not back out to prevent damage to the magnetron

Answer 4

circulator

Question 5

forces the electrons around a bend so they exit the gantry head in the appropriate orientation for treatment

Answer 5

bend magnet

Question 6

the lead filter that attenuates some of the beam in order to provide a more uniform dose distribution

Answer 6

flattening filter

Question 7

parallel plate chambers that check dose rate, integrated dose, and symmetry

Answer 7

ion chambers

Question 8

placed in the path of the beam for electron therapy.

Answer 8

scattering foils

Question 9

for low energy linac the most prevalent interaction

Answer 9

Compton scattering

Question 10

one of the electrodes in the X-ray tube (negative side). consists of the filament and focusing cup. primary function is to produce electrons and focus the electron stream toward the metal anode

Answer 10

cathode

Question 11

positive side of the xray tube. receives electrons from the cathode as a target, dissipates the heat as a result of x-ray production and serves as the path for the flow of high voltage

Answer 11

anode

Question 12

a portion of the anode. this is the point at which x-ray photons are produced (focal spot) and begin to fan out in a divergent path.

Answer 12

target

Question 13

an arrangement of shielding material designed to define the x and y dimensions of the beam of radiation

Answer 13

collimator