Exam 1

Question 0

Which type of dose is attributed to harmful effects from low levels of radiation?

Answer 0

Genetic

Question 1

Which of the following are examples of electromagnetic IONIZING radiation?

Answer 1

X-ray and gamma radiation

Question 2

Is there any logical way that your time spent in DPORT would be exposed to alpha particles?

Answer 2

Yes, by breathing the QC air

Question 3

The large or small focal spot is usually set simultaneously with what?

Answer 3

the millamperes

Question 4

If you wanted to increase the number of PHOTONS reaching your film which could you do?

Answer 4

increase the mA

Question 5

What governs the speed of electrons?

Answer 5

kV

Question 6

Comparing two films with the kV and mAs constant, one taken at 40” FFD and the other at 72”FFD, which would occur?

Answer 6

increased density of the 40” film and decreased image size of 72” film

Question 7

Which of the following is responsible for changing AC current to DC current?

Answer 7

a rectifier

Question 8

How would one figure heat units if one was so inclined to do so?

Answer 8

mA * time * kVp

Question 9

At the usual kV range that you will be xraying spines with which of the following makes up the majority of the beam?

Answer 9

Bremsstrahlung radiation

Question 10

How much energy created by an exposure in a x-ray tube is useful for production of radiograph?

Answer 10

1% (99% heat)

Question 11

What is the main function of the anode? (+)

Answer 11

to stop the electrons

Question 12

Of the following which produces thermionic emission?

Answer 12

the low voltage circuit

Question 13

which of the following is responsible for the anode heel effect?

Answer 13

the bevel of the anode (bev’s heal)

Question 14

The boiling off of electrons is known by which term?

Answer 14

thermionic emmision

Question 15

What part of the tube complex allows one to control the size of the useful beam?

Answer 15

the collimator

Question 16

Which of the following increases patient exposure to radiation?

Answer 16

split screens

Question 17

Where is added filtration located?

Answer 17

on the port of the tube housing

Question 18

Which part of the tube complex will you have to unlock and move to set the tube distance to an upright lateral lumbar film?

Answer 18

the tube stand

Question 19

Which of the following is NOT required to appear on a legal ID marker?

Answer 19

age and birth of patient

Question 20

Federal standards require 2.5 mm of aluminum for which kVp range?

Answer 20

70-100

Question 21

Which of the following is true about collimating from 14”-17” field to an 8” by 10” film?

Answer 21

you would increase tube output

Question 22

One millisievert equals…

Answer 22

100 mrems

Question 23

What would happen if you took a film at 40 inches then moved the tube to 72 inches and took film again. In order to get the same film density you would need to:

Answer 23

increase the mAs by 3 times

Question 24

Which is true about radon?

Answer 24

it makes up more than 50% of our avg annual exposure to radiation

Question 25

Which of the following is a characteristic of x-ray?

Answer 25

short wavelength

Question 26

of your bodies systems which will require the most radiation in an acute blast to screw it up?

Answer 26

nervous system

Question 27

in what country was x-ray discovered?

Answer 27

Germany

Question 28

A wee little photon has sailed thru space at high rate of speed which has carried you into and out of a patient. What is the next thing encountered?

Answer 28

the grid

Question 29

if you had a film that was TOO dark what would you do?

Answer 29

decrease mAs

Question 30

what causes more penumbra?

Answer 30

large focal spot

Question 31

x-ray is produced in which part of the tube?

Answer 31

the target

Question 32

which of the following is the anode heel responsible for?

Answer 32

a reduction in beam intensity

Question 33

which part of the tube prevents the electron cloud from dispersing beyond desired location?

Answer 33

the focusing cup

Question 34

the filtration of the x-ray beam as it passes thru the collimator is mostly due to which?

Answer 34

the shutters

Question 35

if you were taking an A-P open mouth for upper cervical which should you do?

Answer 35

use selective filtration over the eyes

Question 36

What part of the tube complex allows on to move the tube stand in order to set the SID for an upright film?

Answer 36

the tube track

Question 37

The single greatest risk for fetus from ionizing radiation exposure from x-ray is which

Answer 37

childhood leukemia

Question 38

If you took radiograph at 72" and then took another at 40" what would you have to do to maintain same density?

Answer 38

decrease the mAs by 1/3

Question 39

What would you find the p means in kVp

Answer 39

kilo volts PEAK

Question 40

You see a conse, manual collimator, a semi automatic collimator, a fully automatic collimator and a lead diaphragm, what do most people prefer today

Answer 40

manual collimator

Question 41

a dual focus tube has which characteristic that a single focus doesnt?

Answer 41

2 filaments

Question 42

When taking an A-P full spine film of a young female which structures should you be most concerned with in reducing exposure to prevent cancer?

Answer 42

breast

Question 43

Who credited with discovery of x-ray?

Answer 43

WC Roentgen

Question 44

the speed of electrons is controlled by which?

Answer 44

the low vvoltage circuit

Question 45

what is an advantage to using a small focal spot?

Answer 45

clearer image

Question 46

before using a high setting with a tube that has been shut down overnight, it is advisable to do what?

Answer 46

use a tube warm up procedure

Question 47

the "useful beam" exits which part of tube

Answer 47

window

Question 48

what is the international unit designation for 'rad'?

Answer 48

gray

Question 49

the filament is surrounded by what structure?

Answer 49

the focusing cup

Question 50

Which part limits size of useful x-ray beam?

Answer 50

collimator

Question 51

Which year was x-ray discovered?

Answer 51

1895

Question 52

which is recommended fro full spine film

Answer 52

compensating filtration

Question 53

Which part of the tube complex has as its main function the removal of soft rays?

Answer 53

tube filters

Question 54

between the tube and tube hosuing

Answer 54

where is oil normally found in tube complex?

Question 55

kV is primary controlling factor for what?

Answer 55

contrast

Question 56

which is the last thing you should do before pressing expose button?

Answer 56

activate rotor

Question 57

main purpose of oil in tube complex is to aid in

Answer 57

cooling the tube

Question 58

which type of anode should you use?

Answer 58

rotating

Question 59

what is the half value layer used for? (HVL)

Answer 59

filtration recommendations

Question 60

before moving the tube stand on the track what must be accomplished?

Answer 60

the teck must by released

Question 61

about how much reduction in gonad exposure occurs with P-A lumbar compared to A-P lumbar?

Answer 61

95%

Question 62

IF there is a (-) sign on the upper cable attachment on the tube and a plus (+) sign on the the lower of a full spine/lateral sectional film what will occur?

Answer 62

the Cervicals will be too DARK and the Lumbars will be too LIGHT

Question 63

X-rayed the thoracic spine and found all shows up well on &" by 17" A-P except for upper region which is too dark - what did you do?

Answer 63

Didn't filter the upper part

Question 64

Which is true about x-ray?

Answer 64

some materials fluoresce when exposed to them

Question 65

FFD, TFD, and SID refer to what?

Answer 65

distance between the SOURCE of the x-ray and the FILM

Question 66

Which is most commonly used dosimeter

Answer 66

a film badge

Question 67

which effect would a smaller anode angle have compared to a larger angle?

Answer 67

it would create a clearer image

Question 68

of different types of radiation which has biological effects?

Answer 68

ionizing

Question 69

Which contributes to the most radiation to a humans annual exposure?

Answer 69

radon gas

Question 70

which is most helpful in producing a good quality A-P full spine film?

Answer 70

having the anode toward the cervicals

Question 71

Positive beam limitation systems (PBL) would include what?

Answer 71

semiautomatic collimation

Question 72

In checking your collimator, what percentage is the limit for inaccuracy?

Answer 72

2%

Question 73

What is used to tell us that the xray beam is centered to the part bring radiographed?

Answer 73

the light and mirror

Question 74

at a set FFD and film size the less collimation used the ___ the film will be?

Answer 74

DARKER

Question 75

From which of the following does the electron cloud form?

Answer 75

the filament

Question 76

A-P thoracic radiograph the upper part of the spine is OVERexposed, What should you do to get a better film?

Answer 76

used a film for upper part

Question 77

Federal regulation requires how much filtration for an xray machine that operates at 70 kV - 100 kV?

Answer 77

2.5 mm

Question 78

What material is used for the construction of most compensating filters?

Answer 78

Aluminum

Question 79

What part of the tube complex allows one to move the tube stand?

Answer 79

tube track

Question 80

when is the fetus most sensitive to radiation?

Answer 80

1st trimester

Question 81

The ten day rule concerns:

Answer 81

patients during a ten day period from the onset of menses

Question 82

Why is a P-A film BETTER than A-P film for a 13 year old female with scoliosis having 14" by 35" full spine x-ray taken?

Answer 82

it will decrease the breast and gonad exposure

Question 83

What the is the law about radio sensitivity and metabolic rate for young males

Answer 83

use a contact gonad shield

Question 84

radon comes to use in which form?

Answer 84

alpha particles

Question 85

give or take a little natural background radiation accounts for about how much of average annual exposure of ionizing radiation?

Answer 85

80%

Question 86

the beneficial effect of radiation is called

Answer 86

radiation homesis

Question 87

which of the following is not property of xray

Answer 87

they are stored in matter

Question 88

how many rads are in a gray?

Answer 88

100

Question 89

what unit of measure usually used for occupational exposure to radiation

Answer 89

REM

Question 90

What year did BJ palmer introduce x-ray into chiropractic profession

Answer 90

1910

Question 91

which would happen if you lengthened the time of an exposure?

Answer 91

you would increase the number of photons hitting the patient

Question 92

which primary factor is responsible for quiality of xray beam?

Answer 92

mA

Question 93

the mA setting determines which of the following?

Answer 93

the current going thru the filament

Question 94

which would have the least fluctuation in the kV lever?

Answer 94

high frequency

Question 95

what propels the electrons in an x-ray tube

Answer 95

kV

Question 96

the tube warmup procedure should be performed by using how many exposures?

Answer 96

2

Question 97

which part of an xray tube is the target located?

Answer 97

anode

Question 98

the term thermionic emmission is most closely related to what?

Answer 98

the cloud of electrons at filament

Question 99

which of the following three radiograph projections routinely uses compensating filter?

Answer 99

ap thoracic, lateral thoracic, full spine

Question 100

which is the best way to identify patients film

Answer 100

a flash on label before processing