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RAD 1 > Exams > Flashcards

Exams Flashcards

1
Q

What is the purpose of the collimator shutters?

A

Absorb unneeded X-rays

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2
Q

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

A

Rectifier

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3
Q

What part limits the size of the useful x ray beam ?

A

The collimator

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4
Q

Which of the following types of anodes should you use ?

A

Rotating

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5
Q

How many rads are in a grey?

A

100

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6
Q

Who is credited with the discovery of an X-ray?

A

WC roentgen

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7
Q

From what does an electron cloud form?

A

The filament

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8
Q

In what country was x ray discovered?

A

Germany

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9
Q

What are examples of electromagnetic ionizing radiation ?

A

Gamma radiation and x ray

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10
Q

What is the last thing you should do before pressing exp.. button?

A

Activate the rotor

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11
Q

Where is oil normally found in the tube complex?

A

Between the tube and the tube housing

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12
Q

What makes up the majority of the x ray beam (85%) ?

A

Bremsstrahlung radiation

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13
Q

What is the international unit designation for the rad?

A

Gray

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14
Q

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

A

Aluminum

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15
Q

Federal regulation requires how much filtration for an x ray machine that operates 70-100Kv

A

2.5

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16
Q

Which type of X-ray is associated with biological effects?

A

Ionizing

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17
Q

If you wanted to increase the number of photons reaching your film what should you do?

A

Increase the mas

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18
Q

What would have the least fluctuation in the kV level ?

A

High frequency

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19
Q

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

A

2%

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20
Q

The MA setting determines what?

A

The current going through the filament

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21
Q

A tube warm up should be performed by using how many exposures ?

A

2

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22
Q

The initials FFD TFD SID refer to what?

A

The distance between the source of the X-ray and the film

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23
Q

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

A

Genetic

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24
Q

What increases patient exposure to radiation?

A

Split screens

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25
Q

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

A

The milliamperes

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26
Q

What is the beneficial effect of radiation called?

A

Radiation hormesis

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27
Q

If you had film that was too dark what would you do to solve the problem ?

A

Decrease the mas.

28
Q

What is the function of the anode ?

A

To stop the electrons

29
Q

Which part of the x ray is the target located in?

A

Anode

30
Q

Radon comes to use in what form?

A

Alpha particles

31
Q

The number of electrons is controlled by what?

A

Low voltage circuit

32
Q

When is a fetus most sensitive to radiation?

A

1st trimester

33
Q

Are X-rays stored in matter?

A

No

34
Q

About how much recursion of gonad exposure occurs with a P-A film compared to an A-P lumbar film ?

A

95%

35
Q

What is the best way to identify a patients film?

A

A flash on label before processing

36
Q

What is the most commonly used dosimeter?

A

A film badge

37
Q

The filament is surrounded by what structure?

A

The focusing cup

38
Q

The useful beam exits which part of the tube?

A

Window

39
Q

What propels the electrons in an x ray ?

A

The kV

40
Q

What produces thermionic emissions ?

A

The low voltage circuit

41
Q

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

A

The lock must be released

42
Q

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

Radon gas, sun and stars, diagnostic x rays, consumer products. Nuclear power plants.

A

Radon gas

43
Q

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

A

The tube track

44
Q

What is responsible for the anode heel effect?

A

The bevel of the anode

45
Q

How would you figure heat units ?

A

MA x time x kVp

46
Q

Which of the following is not required to appear on the legal id marker?

A

The patients age and or birth date

47
Q

What governs the speed of electrons ?

A

The kV

48
Q

What is the half value layer used for?

A

For filtration recommendation

49
Q

The main purpose of oil in the tube complex is for what?

A

Cooling the tube

50
Q

If a photon sailed through space at a high rate of speed which has went into and out of a patient. What would ne the next thing you encounter ?

A

A grid

51
Q

What does the 10 day rule concern?

A

Patients during a ten day period from the onset of menses

52
Q

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

A

The tube stand

53
Q

The boiling off of electrons is known as what?

A

Thermionic emission

54
Q

What is most helpful in producing a good quality A-P full spine X-ray?

A

Having the anode towards the cervical

55
Q

What is recommend for a full spine film?

A

Compensating filtration

56
Q

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

A

It would create a clearer image

57
Q

Is it true that some materials fluoresce when exposed to x ray?

A

Yes

58
Q

At a set FFD and film size the less collimating used the______the film will be?

A

Cleaner

59
Q

Positive beam limitation systems (PBL) would include what?

A

Semiautomatic collimation

60
Q

What would happen in you lengthened the time of exposure?

A

Increase the number of photons hitting the patient

61
Q

What year was x ray discovered ?

A

1895

62
Q

What is used to tell us that the x ray beam is centered to the part being radiographed.

A

The light and mirror

63
Q

Where is added filtration located?

A

On the port of the tube housing

64
Q

What characteristic does a dual focus tube have that a single focus tube doesn’t?

A

Two filaments

65
Q

When taking a A-P full spine film of a young female what structure should you be most concerned with reducing exposure to prevent the unlikely possibility of cancer?

A

Breast

RAD 1 (4 decks)

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