6

Question 1

primary function of the x-ray imaging system

Answer 1

accelerate electrons from the cathode to the anode in the x-ray tube

Question 2

3 principal parts of an x-ray imaging system

Answer 2

operating console
high-voltage generator
x-ray tube

Question 3

3 types of interaction

Answer 3

excitation (anode heat)
ionization (characteristic radiation)
nuclear absorption (bremsstrahlung)

Question 4

modern x-ray imaging system conveys to the x-ray tube target an enormous number of electrons at a precisely controlled kinetic energy
(no answer)

Answer 4

modern x-ray imaging system conveys to the x-ray tube target an enormous number of electrons at a precisely controlled kinetic energy

Question 5

distance between the filament and the x-ray tube target

Answer 5

1 cm

Question 6

Electrons traveling from cathode to anode constitute the x-ray tube current

Answer 6

projectile electrons

Question 7

what happen when projectile electrons hit the
heavy metal atoms of the x-ray tube target?

Answer 7

transfer their kinetic energy to the target atoms

Question 8

when projectile electron interacts with the orbital electrons or the nuclear field of target atoms

Answer 8

result in the conversion of KE into thermal energy (heat) and electromagnetic energy in the form of infrared radiation (also heat) and x-rays

Question 9

kinetic energy of projectile electrons is converted into

Answer 9

heat

Question 10

constant excitation and return of outer shell electrons

Answer 10

anode heat

Question 11

Approximately ___ of the kinetic energy of projectile electrons is converted to heat.

Answer 11

99%

Question 12

Only approximately __ of projectile electron kinetic energy is used for the production of x-radiation.

Answer 12

1%

Question 13

increase of anode heat results

Answer 13

increase in x-ray tube current
increase of kVp

Question 14

efficiency of x-ray production is independent of the tube current.
(no answer)

Answer 14

x-ray production remain constant

Question 15

projectile electron interacts with inner shell that is sufficiently violent to ionize the target atom through total removal of an inner-shell electron.

Answer 15

characteristics x-ray

Question 16

emitted when outer shell electron fills an inner shell void

Answer 16

characteristics x-ray

Question 17

effective energy of characteristic x-rays increases with increasing atomic number of the target element
(no answer)

Answer 17

increase of the energy of cx = increase of atomic no.

Question 18

kinetic energy of the projectile electron is also converted into electromagnetic energy.

Answer 18

Bremsstrahlung Radiation

Question 19

The closer the projectile electron gets to the nucleus

Answer 19

the more it is influenced by the electric field of the nucleus.

Question 20

meaning of bremsstrahlung

Answer 20

“slowed-down radiation”

Question 21

radiation use in diagnostic range

Answer 21

bremsstrahlung x-rays

Question 22

K-characteristic x-rays require an x-ray tube potential

Answer 22

69 kVp

Question 23

useful for imaging.

Answer 23

K-characteristic x-rays of tungsten