Test 3

Question 1

The energy of classic scatter is ________ than that of the original photon

Answer 1

The same

Question 2

Classic scatter also called ________ scatter only occurs at energy levels way below diagnostic range

Answer 2

Classic, Thompson, unmodified

Question 3

________ reaction always occurs in tandem with pair production

Answer 3

Annihilation

Question 4

The effects of Compton an photoelectric effect on the xray bean are collectively referred to as

Answer 4

Attenuation

Question 5

The interactions associated with very high energy levels way above the diagnostic range occur in which portion of atoms

Answer 5

Nucleus

Question 6

Pair production produces a ______ and a negatron

Answer 6

Positron

Question 7

What 2 interactions happen within diagnostic range

Answer 7

Photoelectric, Compton, or nothing

Question 8

What are the 5 interactions between X-rays and matter

Answer 8

Coherent 
Photoelectric
Compton scattering
Pair production
Photo disintegration

Question 9

Incident xray ionizes inner she’ll e-

Answer 9

Photoelectric

Question 10

Incident xray ionizes outer shell e-

Answer 10

Compton

Question 11

Incident xray excites atom, changes direction exits

Answer 11

Coherent

Question 12

High energy photon and/or nuclear forces comes close to nucleus and disappears releasing a positron and a negatron

Answer 12

Pair production and annihilation

Question 13

Extremely high energy level photon absorbed by nucleus and disappears. Atom releases nuclear fragment

Answer 13

Photo disintegration

Question 14

As kVp increases the number of photons transmitted without interaction_______

Answer 14

Increases

Question 15

As kVp increases photoelectric ______

Answer 15

Decreases increasing Compton interactions

Question 16

In _________ interaction the photon is totally absorbed and incident xray photon disappears

Answer 16

Photoelectric

Question 17

In _________ interaction, xray continues but changes direction and loses energy

Answer 17

Compton

Question 18

Xray loses no energy just changes interaction

Answer 18

Coherent

Question 19

In pair production ________ hooks up with a free e- and undergoes annihilation reaction -converted to energy

Answer 19

Positron

Question 20

Extremely low energy xray not in diagnostic range

Answer 20

Coherent scatter

Question 21

Recoil e- drops into vacancy caused by a previous ionization

Answer 21

Compton

Question 22

Characteristic xray production occurs in the tissue by cascading of outer shell e- causing secondary production radiation (also absorbed)

Answer 22

Photoelectric

Question 23

Important in PET and Nuc Med

Answer 23

Pair production

Question 24

T/F photoelectric effect contributes to image

Answer 24

False

Question 25

T/F Compton effect adds unwanted exposure to radiographic image

Answer 25

True

Question 26

Scattered xray not in diagnostic range

Answer 26

Coherent

Question 27

Doesn't occur in diagnostic radiation

Answer 27

Photodisintegration