Unit 1-Chapter 6

Question 1

What accounts for a much smaller percentage of the total photons in the x ray beam

Answer 1

Characteristic

Question 2

What shell (inner or outer) does the electron interact with for characteristic radiation

Answer 2

inner

Question 3

Electron collides with inner shell knocking that electron out of orbit and leaves a vacancy in inner shell making the atom unstable so an electron from the outer shell fills vacancy.

Answer 3

Characteristic

Question 4

During the cascade effect, an outer shell electron fills the void left by an inner shell vacancy release some energy. This energy is released in the form
of an?

Answer 4

x-ray photon

Question 5

Energy required to remove an inner shell from orbit during characteristic interactions?

Answer 5

69.5

Question 6

What are the three requirements for creating x ray photons

Answer 6

source of electrons
acceleration of electrons
deceleration if electrons

Question 7

nucleus
positive or negative electric field

Answer 7

positive

Question 8

electrons
positive or negative electron field

Answer 8

negative

Question 9

Which process is when an electron is attracted to the nucleus causing the electrons to slow down, change direction, and lose some energy

Answer 9

brem

Question 10

lost energy from the attraction of an electron and nucleus creating x ray photons due to what type of interaction

Answer 10

brem

Question 11

brem energy depends on

Answer 11

energy of incoming electron
how close electron passes through nucleus

Question 12

if tube potential is set at 75 kvp what is the maximum brem energy

Answer 12

75 keV

Question 13

x axis

Answer 13

different energies

Question 14

y axis

Answer 14

number of x rays

Question 15

what does the energy of the characteristic x ray depend on

Answer 15

binding energy
energy level of filament electron
she’ll of electron that is dropping to fill vacancy

Question 16

what factors affect beam quantity

Answer 16

mAs, kVp, distance, and filtration

Question 17

what factors affect beam quality

Answer 17

kvp and filtration

Question 18

if kVp is doubled the quantity of radiation is increased by a factor of

Answer 18

4

Question 19

the average energy of a brems photon is _____ of the kVp selected at the control panel

Answer 19

1/3

Question 20

primary contributor to inherent filtration

Answer 20

target window

Question 21

extra 2.0 mm AL Placed between target window and collimator

Answer 21

added filtration

Question 22

general purpose AL equivalence

Answer 22

2.5

Question 23

combination of added and inherent filtration

Answer 23

total filtration

Question 24

refers to total number of x ray photons in beam

Answer 24

quantity

Question 25

beam quantity is directly proportional to what

Answer 25

mAs

Question 26

doubling the mas doubles the

Answer 26

quantity

Question 27

number of electrons boiled off the filament

Answer 27

mAs

Question 28

when adjustments in quantity are desired , what should be adjusted

Answer 28

mAs

Question 29

A 15% increase in kVp is equivalent to

Answer 29

doubling mAs

Question 30

intensity ___________ if the distance is reduced to one half of its original value

Answer 30

quadruples

Question 31

refers to penetrating power of x ray beam

Answer 31

beam quality

Question 32

beam quality is measured by

Answer 32

half value layer

Question 33

normal hvl of general beams is

Answer 33

3-5 mm Al

Question 34

refers to the x ray beam as it is upon exiting the collimator and exposing patient

Answer 34

primary beam

Question 35

refers to the x ray beam that remains after interaction with the patient and is exiting the patient to expose the image receptor

Answer 35

remnant beam

Question 36

photons exiting the patient without having interacted with anatomy

Answer 36

transmitted photons

Question 37

what has a discrete emission spectrum

Answer 37

characteristic

Question 38

what has a continuous emission spectrum

Answer 38

brem

Question 39

what effects quality

Answer 39

kvp and filtration

Question 40

what five factors change the appearance of emission spectrum

Answer 40

ma , kvp, filtration, generation type, and target material

Question 41

used to balance exposure to IR by filtering x rays from the thinner areas of the anatomical area of interest

Answer 41

compensation/ wedge

Question 42

penetration power

Answer 42

beam quality