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Radiography I > Diagnostic X-Ray Production > Flashcards

Diagnostic X-Ray Production Flashcards

1
Q

This is located near the control panel

A

On/Off Switch

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2
Q

This is mounted at eye level within reach of the x-ray generator

A

Wall switch

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3
Q

This keeps electricity constant in clinic while taking x-rays
Connected through kVp switch and has a method for increasing or decreasing incoming voltage

A

Line Voltage Compensator

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4
Q

Main power supply to the x-ray machine

A

Circuit breakers

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5
Q

Absorbs electrons and redirects the current

A

Ground

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6
Q

Current in radiographic generators

A

Milliamperage

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7
Q

How much voltage is in most houses?

A

110 v

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8
Q

How much voltage does an x-ray machine need?

A

220 v

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9
Q

How many lines does an x-ray machine use?

A

2 110v and 1 ground line

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10
Q

These are used to increase the potential power of the electrical supply

A

Generators

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11
Q

This type of generator has a low power capacity

A

Single phase

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12
Q

This type of generator is a step-up from single phase, but less powerful than the three phase

A

High Frequency Generator

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13
Q

This generator has powerful and shorter exposure times and tube utilization is more efficient

A

Three Phase Generator

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14
Q

An apparatus for changing electrical energy at one voltage and current to electrical energy of another voltage and current through magnetic energy
Receives power from incoming lines and transforms the power to the x-ray tube

A

Transformers

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15
Q

3 types of transformers found in an x-ray circuit

A
  1. Autotransformer
  2. High-tension transformer
  3. Filament transformer
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16
Q

This transformer determines how much voltage goes into step-up transformer

A

Autotransformer

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17
Q

This type of transformer takes incoming volts and turns it into 1000s of volts
220v ->125,000 volts

A

High Voltage Transformer

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18
Q

The high voltage transformer is AKA

A

Step-up transformer

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19
Q

This transformer decreases incoming volts going to the filament

A

Filament transformer

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20
Q

The Filament transformer is AKA

A

Step-down Transformer

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21
Q

The voltage reaching the step-down transformer is determined by this setting on the x-ray machine

A

mA

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22
Q

2 circuits in an x-ray machine

A

High Voltage and Low voltage

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23
Q

This type of circuit provides electrical potential to transport electrons from the cathode to the anode
Contains: Autotransformer and Step-up transformer

A

High Voltage circuit

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24
Q

The high voltage circuit is controlled by which setting?

A

kV

25
Q

This circuit provides electricity/amperage to heat the filament
Contains: Step-down transformer

A

Low Voltage (filament) circuit

26
Q

The Low voltage circuit is controlled by this setting

A

mA

27
Q

This is used to control the length of exposure on the control panel

A

Time Switch

28
Q

How many times do you use the exposure switch?

A

1 partial depression

1 full depression

29
Q

This illuminates when exposure is made

A

Warning light

30
Q

The x-ray tube houses what two structures?

A

Cathode and Anode

31
Q

The cathode has a ______ charge

A

negative

32
Q

The anode has a _______ charge

A

positive

33
Q

What does the oil around the glass casing of an x-ray tube do?

A

Dissipates heat

34
Q

The x-ray tube is primarily

A

99% heat, 1%x-ray

35
Q

This is positioned opposite of the anode in an x-ray tube and contains 2 filaments

A

Cathode

36
Q

What are the filaments in the cathode made of?

A

Tungsten

37
Q

What is the focusing cup of the cathode made of?

A

Molypdenum

38
Q

Themionic emission can be described as

A

Boiling off electrons

39
Q

This mechanism in the x-ray tube receives electrons from the cathode and transmits them back to the high-voltage generator

A

Anode

40
Q

What is the anode typically made of?

A

Tungsten or tungsten molybdenum alloy

41
Q

2 types of anodes

A
  1. stationary

2. rotating

42
Q

Which type of anode produces a more detailed radiograph?

A

rotating

43
Q

What type of anode is found in a table top machine?

A

Rotating

44
Q

What type of anode is found in a portable machine (lg. animal or dental)?

A

Stationary

45
Q

This turns the rotating anode

A

Rotor circuit

46
Q

How fast does the rotor circuit spin the anode?

A

3200-3600 rpms

47
Q

This is the area that is perpendicular to the surface of the target

A

Actual focal spot

48
Q

This is the area projected out of the tube toward the patient

A

Effective focal spot

49
Q

This describes how electrons interact with the anode and change direction, so the x-rays are directed at the patient

A

Line focus principle

50
Q

What is the typical angle of an anode?

A

11 degrees

51
Q

This can enlarge the effective focal spot, making the quality of radiographs decrease from too many exposures in a short period of time

A

Heat dissipation

52
Q

Too much heat can lead to this damage to the anode

A

pitting

53
Q

This indicated the x-ray tube limits based on mA, kVp, and time
Expressed in kilowatts

A

Tube Rating Chart

54
Q

Portable units can usually handle how much kVp?

A

60-90

55
Q

Table top units can usually handle how much kVp?

A

40-120

56
Q

This relates to the radiation intensity is greater on the cathode side than the anode side

A

Anode Heel effect

57
Q

Most common x-ray tube failure

A

Cathode failure

58
Q

What causes cathode failure in an x-ray tube?

A

Filament destruction/overheat

Radiography I (5 decks)

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