Physics Ii Test 2

Front 1

product of absorption and scattering

Back 1

attentuation

Front 2

All names of Coherent scattering:

Back 2

unmodified, classical, elastic, Thomson, Rayleigh

Front 3

Z number of Al:

Back 3

13- Aluminum

Front 4

Z number for Tungsten:

Back 4

74

Front 5

Incoming photon is completely absorbed by an inner shell electron

Back 5

photoelectric effect

Front 6

Gives the patient their dose of radiation:

Back 6

photoelectric effect

Front 7

Gives us our occupational dose:

Back 7

compton effect/ scattering

Front 8

Incoming photon interacts with, and transfers some of its energy to, an outer shell electron. This excess energy in the outer shell electron causes it to be ejected from the atom.

Back 8

Compton effect/ scattering

Front 9

What is the ejected electron called that happens during compton scattering?

Back 9

recoil electron; compton recoil; secondary electron

Front 10

Where does diagnostic radiation production happen?

Back 10

in the x-ray tube

Front 11

What are the two types of diagnostic radiation production?

Back 11

characteristic and bremsstrahlung

Front 12

What type of radiation is this describing?

Incoming electron interacts with an inner shell electron.

Back 12

characteristic radation

Front 13

What type of radiation is this describing?

Incoming electron interacts with a nuclear force field and results in a scattered electron and continuous x-ray energy.

Back 13

Bremmstrahlung

Front 14

What 2 interactions with matter are important to diagnostic radiography?

Back 14

photoelectric effect and compton scattering

Front 15

If the incoming x-ray photon interacts with an inner shell electron, what interaction is this?

Back 15

photoelectric effect/absorption

Front 16

If the incoming x-ray photon interacts with an outer shell electron, what interaction is this?

Back 16

compton scattering/ effect

Front 17

What interaction occurs between an incident x-ray and the atom's nucleus and forms a positron?

Back 17

pair production

Front 18

What energy is required for pair production to occur?

Back 18

1.02 MeV

Front 19

What interaction occurs with high energy x-rays that are 10 MeV or higher and strike the nucleus of an atom?

Back 19

photodisintegration

Front 20

What is an example of a series circuit?

Back 20

a string of christmas lights

Front 21

Which circuit has more resistance?

Back 21

a series circuit

Front 22

If there is one broken pathway this type of circuit will still work. What type of circuit is this?

Back 22

parallel

Front 23

What is the power formula?

Back 23

P= I * V

Power is measured in watts

Front 24

What controls density?

Back 24

mAs

Front 25

What do AEC systems measure?

Back 25

radiation exposure reaching the IR

Front 26

What does AEC stand for?

Back 26

Automatic Exposure Control

Front 27

What are two types of AEC systems?

Back 27

phototimes and ionization chambers

Front 28

This type of AEC system used photomultiplier tubes or photodiodes.

Back 28

phototimer

Front 29

Uses 3 radiation measuring detectors, called?

Back 29

sensors, chambers, or cells

Front 30

This uses a florescent screen and a device that converts light to electricity.

Back 30

phototimer

Front 31

This is a system of hollow cells that contain air and are connected to the timer circuit via an electrical wire.

Back 31

Ionization chambers

Front 32

Where are the ion chambers located?

Back 32

In front of the IR

Front 33

Where are the phototimers located?

Back 33

Behind the IR

Front 34

Improper centering over the correct ionization chambers could result in an image that is?

Back 34

overexposed or underexposed

Front 35

AEC controls only the radiographic ______________. It has no effect on ________________.

Back 35

density; contrast