Arrt Review

Front 1

radiation monitoring equipment depends on

Back 1

ionization

Front 2

alpha particles contain 2 protons and 2

Back 2

neutrons

Front 3

____ refers to measuring the quantity of an x ray beam ?

Back 3

dosimetry

Front 4

____ is the most most penetrating beam

Back 4

gamma

Front 5

gamma is considered electro ___

Back 5

magnetic

Front 6

average dose per person in usa

Back 6

.25msv

Front 7

biological dose ?

Back 7

RBE

Front 8

___ can effect the rate of decay

Back 8

nothing

Front 9

film badges have filters inside to determine radiation _____

Back 9

energies

Front 10

the rad rem, and roentgen will all be equal measuring ___

Back 10

x ray

Front 11

background radiation how much annually

Back 11

5msv

Front 12

best way to find out if pregnant

Back 12

blood pregnancy test

Front 13

dose rate at the table top during flouro cannot exceed __r per minute

Back 13

10

Front 14

beam filtration makes the primary beam more _____geneous

Back 14

homogenous

Front 15

best way to see adequate filtration

Back 15

half value layer measurement

Front 16

what percent to general public due to imaging

Back 16

50%

Front 17

quality of beam measured by

Back 17

half value layer

Front 18

dose for the hands of a technologist

Back 18

500msv

Front 19

personnel monitoring is required when there is a chance you will recieve ___ the effective dose

Back 19

1/10

Front 20

protective gloves

Back 20

.25mm

Front 21

effective dose worker can recieve in one quarter ?

Back 21

30msv

Front 22

what percentage of the primary exposure to the patient will reach a worker 1 meter away

Back 22

.1%

Front 23

stage of cell division most radiosensitive

Back 23

metaphase

Front 24

matter energy and their relationship to each other

Back 24

physics

Front 25

what must be applied in order to set a resting body in motion ?

Back 25

force

Front 26

newtons second law of motion

Back 26

f=ma

Front 27

metric units of physics

Back 27

meters, kilograms, seconds

Front 28

how many lbs in a kg

Back 28

2.2

Front 29

how many cm in an inch

Back 29

2.54

Front 30

push or pull on an object called

Back 30

force

Front 31

unit of force

Back 31

newton

Front 32

prefix for one million

Back 32

mega

Front 33

define power

Back 33

rate at which work is done

Front 34

energy cant be created nor destroyed but can be changed is the law of

Back 34

conservation of energy

Front 35

unit of power

Back 35

watt

Front 36

prefix kilo stand for

Back 36

1000

Front 37

unit of electrical charge

Back 37

coulomb

Front 38

work done on a charged particle is measured in what

Back 38

volt

Front 39

when an electorn is accelerated trhough a potential diff of 1 volt how much work is done

Back 39

1 electron volt

Front 40

unit of capacitance

Back 40

farad

Front 41

what is equal to one volt

Back 41

1joule/coulomb

Front 42

excessive amount of electrons at one end of a conductor and a defiecency at the other is known as what

Back 42

voltage

Front 43

which type of current is suppled by a battery

Back 43

direct

Front 44

resistanse in a circuit is equal to the voltage divided by the current

Back 44

ohms law

Front 45

what would the voltage be if the resistanse is 2 ohm and the current is 4 ampers

Back 45

8 volts

Front 46

series circuit amperage remains ____

Back 46

constant

Front 47

what device will prevent equipment damage if currents get to high

Back 47

circuit breaker

Front 48

device whose electrical resistance may be varied is called what

Back 48

rheostat

Front 49

forumla for electrical power

Back 49

p=vi

Front 50

what is a material called that will attract small pieces of iron

Back 50

magnet

Front 51

determines the strength of a magnetic field ?

the number of ___ ____

Back 51

flux lines

Front 52

in which direction do magnetic flux lines travel

Back 52

north to south

Front 53

what surrounds ever electrical current

Back 53

magnetic field

Front 54

when current increases magnetic field strenth ___

Back 54

increases

Front 55

rules determine direction of the magnetic field

Back 55

left hand thumb rule

Front 56

which direction would the magnetic field be if the current is toward you

Back 56

clockwise

Front 57

what is a spring shaped coil of wire called

Back 57

helix

Front 58

what is a current carrying coil of wire called

Back 58

solenoid

Front 59

what is called when a solenoid has an iron core in its center

Back 59

electromagnet

Front 60

what are materials called that are not attracted to a magnet

Back 60

non magnetic

Front 61

called that are weakly attracted to a magnet

Back 61

paramagnetic

Front 62

materialls that are easily magnetized and demagnetized are said to have a high

Back 62

permeability

Front 63

maximum induction will occur when a conductor cuts a magnetic field at what angle

Back 63

90 degrees

Front 64

difficult to magnetize and demagnetize have a high ____

Back 64

retentivity

Front 65

a ___ works by sending an alternatin current through a coil of wire that has been placed within a magnetic field

Back 65

motor

Front 66

what is it called when a current is induced in a secondary coil by simply alternating the current in the primary coil

Back 66

mutual induction

Front 67

what type of transformer has more turns of wire in the secondary side than in the primary side

Back 67

step up

Front 68

what type of transformer core is most widly used in xray equip

Back 68

shell type

Front 69

what determines the transformer ratio

Back 69

turns of wire

Front 70

whaich type of transformer core is most effiecient

Back 70

shell type

Front 71

if the voltage is stepped up what happens to the current in the secondary side of the transformer ?

Back 71

decreases

Front 72

as magnetic domains rearranfe what is this energy loss called

Back 72

hysteris losses

Front 73

which of the following materials would make the best transformers and produce heat losses

Back 73

eddy currents

Front 74

the number of cycles per sec that are with an alternating current are known as the currents what ?

Back 74

frequency

Front 75

60 cycle ac current how many turns every second

Back 75

120

Front 76

how are alternating current values usually expressed ?

Back 76

current cannot flow without it

Front 77

an electric current that continually changes directions is known as what type of current ?

Back 77

alternating

Front 78

what is a device called that allows current to flow in only one direction

Back 78

semiconductor

Front 79

what is the voltage supplied to the autotransformer called ?

Back 79

line voltage

Front 80

what controls the incoming voltage to the autotransformer

Back 80

main breaker switch

Front 81

tapping windings of the autotransformers to supply voltage to the step up transformer is the purpose of ____

Back 81

kvp selector

Front 82

if line voltage changes because of demand , adjustments are made by a ___

Back 82

line voltage compensator

Front 83

which of the following is placed in the circuit in case of current changes during the exposure ?

Back 83

breaker switch

Front 84

timer located in x ray circuit ? betweend autotransformer and ____

Back 84

step up transformer

Front 85

what device would be used when the ma is set on the control panel ?

Back 85

rheostat

Front 86

which of the following meters does not register until an x ray exposure is made ?

Back 86

millammeter

Front 87

current supplied to the x ray tube

Back 87

direct current

Front 88

which of the following is the current idicated by the milliammeter ?

Back 88

tube current

Front 89

what causes most x ray tube failures

Back 89

excessive heat

Front 90

type of primary radiation below 70kvp

Back 90

brem

Front 91

produce least load on tube

Back 91

high kvp , low mas

Front 92

what is the area of the xray trget called that is struck by electrons

Back 92

actual focal spot

Front 93

ma x kvp x time =

Back 93

heat units

Front 94

small craters in the target of a used anode of an xray tube are known as what

Back 94

pitting

Front 95

main determinant in selecting a focal spot size

Back 95

ma

Front 96

voff-distance grid cut-off is characterized by which of the following?

Back 96

both sides of the image are underexposed

Front 97

what is a 3-dimensional radiograph called that is produced by two angled views of the same structure?

Back 97

steroradiograph

Front 98

which of the following is an example of a compensating filter?

Back 98

aluminum wedge filter

Front 99

radiographic quality is achieved by balancing which of the following shaprness of detail and

Back 99

visibility of detail

Front 100

ff-center grid cut-off would demonstrate which of these

Back 100

one side of the image would be underexposed

Front 101

characteristic curve relationship between density and

Back 101

distortion

Front 102

subtraction used for

Back 102

angiographic studies

Front 103

how many lines per inch are normal in modern radiographic grids?

Back 103

100

Front 104

hich of the following causes the most repeated radiographs in a radioglogy department?

Back 104

positioning errors

Front 105

properly formulated technique chart could accurately be used for what percentage of pts

Back 105

90%

Front 106

the distance b/w the lead strips of a foucused grid to a point where all lines converge is known as what?

Back 106

grid focusing distance

Front 107

which of the following affects grid efficency the most?

Back 107

grid ration

Front 108

What is the definition of recorded detail?

Back 108

The lack of distortion in the image

Front 109

ecorded detail / spatial resolution can be improved by which of the following?

Back 109

smaller focal spot size

Front 110

The ability of a digital system to display details (expressed as the number of line pairs per millimeter) is known as what

Back 110

spatial resolution

Front 111

Each cell of an image matrix is called what

Back 111

pixel

Front 112

Spatial resolution in digital imaging is determined by which of the following matrix size and size of the

Back 112

field of view

Front 113

Geometric unsharpness is directly proportional to which of the following

Back 113

oid

Front 114

Recorded detail/spatial resolution can be improved by which of the following reducing

Back 114

focal spot size

Front 115

hich of the following radiographic qualities determines the sharpness of detail in the finished radiograph recorded detail / spatial resolution and

Back 115

distortion

Front 116

flat-panel detector's detector element (DEL) size determines which of the following

Back 116

spatial resolution

Front 117

How well an imaging system reproduces the actual object is referred to as what

Back 117

Modulation transfer function

Front 118

Which of the following will have the greatest effect on reducing motion on an abdomen radiograph

Back 118

suspend respiration

Front 119

Which of the following is the most important factor in controlling size distortion

Back 119

oid

Front 120

hat is another name for the midsagittal plane

Back 120

median plane

Front 121

The scapula is classified as what type of bone?

Back 121

flat bone

Front 122

Which of the carpal bones is "pea shaped"?

Back 122

pisiform

Front 123

The extremities, the shoulder girdle and the pelvis make up the__ skeleton.

Back 123

appendicular

Front 124

or the medail oblique projection of the foot, how many degrees should the foot be rotated?

Back 124

30

Front 125

What is the rounded process on the proximal, medial aspect of the femur of the femur called?

Back 125

lesser

Front 126

What is the most proximal end of the fibula called?

Back 126

apex

Front 127

what is the name of the largest tarsal bone

Back 127

talus

Front 128

Which of the following drugs is an anticoagulant

Back 128

heparin