Interactions

Question 1

What is the reduction in xray beam intensity as a result of absorption and scatter in matter?

Answer 1

Attenuation

Question 2

What is the number of xray photons?

Answer 2

intensity

Question 3

What is the xrays that leave the patient?

Answer 3

Remnant beam

Question 4

What are the interactions?

Answer 4

Photoelectric absorption
coherent sccattering
compton scattering

Question 5

What is the purpose of a grid?

Answer 5

increases contrast

Question 6

Coherent is a _____ in and ______ out?

Answer 6

photon, photon

Question 7

Does coherent have ionization?

Answer 7

no only excitation

Question 8

During coherent interaction what happens to patient dose?

Answer 8

no effect

Question 9

During coherent interaction what happens to bystander dose?

Answer 9

no effect

Question 10

During coherent interaction what happens to image quality?

Answer 10

decreases contrast

Question 11

What interaction occurs at less than 10 keV?

Answer 11

coherent

Question 12

During coherent: ____ photon, ____ scatter, ____contrast

Answer 12

decrease
increases
decreases

Question 13

Photoelectric is a _____ in and a _____ out?

Answer 13

photon, electron

Question 14

Does photoelectric have ionization?

Answer 14

yes, inner shell interaction

Question 15

What happens to patient dose during photoelectric?

Answer 15

increases

Question 16

What happens to bystander dose during photoelectric?

Answer 16

no effect bc there is no scatter

Question 17

What happens to image quality during photoelectric?

Answer 17

increases contrast

Question 18

During photoelectric: ____ kvp, ____absorption, ____contrast

Answer 18

decrease
increase
increase

Question 19

low kVp= ____ absorption

Answer 19

more

Question 20

What interaction occurs when there is more than 10 keV?

Answer 20

photoelectric

Question 21

What interaction is the most common?

Answer 21

compton

Question 22

What interaction is an outter shell interaction?

Answer 22

compton

Question 23

Compton is a _____ in and _____out, _____out?

Answer 23

photon
electron
photon

Question 24

Does compton have ionization?

Answer 24

yes and scatter

Question 25

How does compton effect patient dose?

Answer 25

increases patient dose

Question 26

How does compton effect bystander dose?

Answer 26

increases because of the scatter

Question 27

What interaction is the number one source of increased bystander dose?

Answer 27

compton

Question 28

How does compton effect image quality?

Answer 28

decreases contrast

Question 29

More matter=____ scatter

Answer 29

more

Question 30

During compton ____ kvp, ____ scatter, _____ contrast.

Answer 30

increase increase decrease

Question 31

What interaction is an incoming photon interacts with an entire atom, the energy of that photon is temporarily absorbed but then ejected as a scattered photon?

Answer 31

coherent scattering "classical"

Question 32

scatter photon energy is ____ to the energy of the incident xray photon.

Answer 32

equal

Question 33

What interaction is a photon enters the atom of the body, xray photon is completely absorbed by an inner shell electron. Electron is then knocked out of orbit causing ionization?

Answer 33

Photoelectric

Question 34

What interaction is an xray photon is partially absorbed by a loosely bound outter shell electron, resulting in the electron being knocked out of the orbit causing ionization

Answer 34

compton

Question 35

What interaction occurs at all energy levels?

Answer 35

compton