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rad100 > x-ray circuit > Flashcards

x-ray circuit Flashcards

1
Q

maintains a constant level of power

A

line voltage compensator

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2
Q

supplies 220 volts

A

line voltage compensator

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3
Q

60 hz AC

A

line voltage compensator

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4
Q

tapping the windings at different points to achieve different voltage levels

A

autotransformer

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5
Q

source for selecting kVp

A

autotransformer

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6
Q

voltage is stepped up or down

A

autotransformer

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7
Q

AC

A

autotransformer
step-up transformer
step-down transformer

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8
Q

controlled by the kVp selection on the control panel

A

autotransformer

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9
Q

electromagnetic self-induction

A

autotransformer

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10
Q

allows you to vary the voltage sent to the rest of the tube circuit

A

autotransformer

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11
Q

connected in parallel with the component

A

voltmeter

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12
Q

indicates what voltage was selected

A

voltmeter

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13
Q

monitors voltage before the exposure is made

A

voltmeter

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14
Q

used to regulate the duration of the X-ray exposure

A

timer

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15
Q

electronic timer

A

timer

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16
Q

mAs timer

A

timer

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17
Q

AEC

A

timer

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18
Q

falling load generator

A

timer

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19
Q

determines the amount of time the tube circuit is energized

A

timer

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20
Q

voltage in the primary coil is boosted to the kilovoltage level of thousands of volts to the secondary coil

A

step-up transformer

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21
Q

turns ratio determines how much the voltage is stepped up

A

step-up transformer

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22
Q

the greater the turns ratio the higher the resulting kV

A

step-up transformer

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23
Q

turns ratio can be between 500-1000

A

step-up transformer

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24
Q

also known as high high-voltage transformer

A

step-up transformer

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25
Q

closed core

A

step-up transformer
step-down transformer

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26
Q

changes AC to DC

A

rectifier

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27
Q

solid state diodes

A

rectifier

28
Q

consist of silicon-based n-p-type semiconductors

A

rectifier

29
Q

provides full wave rectification for single-phase generator

A

rectifier

30
Q

provides full-wave rectification for three-phase equipment

A

rectifier

31
Q

measures tube current

A

mA meter

32
Q

wired between rectifier and x-ray tube

A

mA meter

33
Q

rheostat

A

mA control

34
Q

variable resistor

A

mA control

35
Q

regulates the number of electrons available at the filament to produce X-ray

A

mA control

36
Q

manipulated by radiorapher via mA station on the control panel

A

mA control

37
Q

reduces voltage and increases current

A

step-down transformer

38
Q

high current sent to heat the filament

A

step-down transformer

39
Q

incoming voltage to 6-12 and 3-5 amps

A

step-down transformer

40
Q

greater number of turns on the primary side compared to the secondary side

A

step-down transformer

41
Q

induction motor

A

x-ray tube

42
Q

thermionic emission

A

x-ray tube

43
Q

DC

A

x-ray tube

44
Q

electrons move at 1/2 the speed of light

A

x-ray tube

45
Q

step-up transformer does what to voltage and what to amps?

A

increases
decreases

46
Q

what is a semiconductor?

A

A material that can sometimes conduct an electric current and sometimes not,
depending on the voltage applied across that material.

47
Q

what is AEC?

A

An electronic device designed to terminate x-ray exposure after properly exposing
an image receptor

48
Q

what is line compensation?

A

method of adjusting the voltage to the x-ray imaging system to a constant value, to
compensate for fluctuations in voltage supplied by the power company

49
Q

what is a capacitor?

A

An electric circuit device that stores electric charge.

50
Q

Placed in the tube circuit, connected at the center of the secondary winding of the
high-voltage step-up transformer in series with the x-ray tube. This reduces the
possibility of shock.

A

mA meter location

51
Q

An electric device that contains two electrodes

A

diode

52
Q

The fluctuation in the voltage applied to the x-ray tube expressed as a percentage of
peak kilovoltage

A

voltage ripple

53
Q

The process of changing alternating current and voltage into direct current and
voltage

A

rectification

54
Q

A type of transformer having a single winding

A

autotransformer

55
Q

he product of voltage and current. Watt

A

power

56
Q

what is radiolucent?

A

Allow relatively undiminished intensity of x-rays through the tabletop

57
Q

describe the movements of a patient’s couch

A

90 degrees to vertical so that the patient is standing; 20 degrees head-down

58
Q

5 major controls on the control panel

A

On/off control, kVp selection, mA selection, time (mAs) selection, and automatic-
exposure controls

59
Q

the purpose of the autotransformer

A

To vary and control the amplitude of the voltage supplied to the high-voltage step-up
transformer and the filament transformer.

60
Q

how does primary voltage relate to secondary voltage in an autotransformer?

A

Primary voltage and secondary voltage are in direct relation to the number of turns of
the transformer

61
Q

what does the prereading kVp meter allow

A

The precise adjustment of the supply voltage and monitoring the kVp before the x-ray
exposure

62
Q

what is the difference between a high-voltage generator and a high-voltage transformer?

A

The high-voltage transformer is just one component of a high-voltage generator

63
Q

What is the voltage ripple?
- single phase
- three-phase six-pulse
- three-phase, twelve pulse
- high frequency

A
  • 100
  • 14
  • 4
  • 1
64
Q

what is the only type of high-voltage generator that can be positioned in or on the x-ray tube housing?

A

high-frequency generator

65
Q

equations for computing single-phase and high-frequency phase power rating

A
  • Single-phase power (kW) = 0.7 (mA)(kVp) ́ 10−3
  • Three-phase power (kW) = (mA)(kVp) ́ 10−3

rad100 (10 decks)

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