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Rad100 > x-ray circuit > Flashcards

x-ray circuit Flashcards

(65 cards)

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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
closed core
step-up transformer step-down transformer
26
changes AC to DC
rectifier
27
solid state diodes
rectifier
28
consist of silicon-based n-p-type semiconductors
rectifier
29
provides full wave rectification for single-phase generator
rectifier
30
provides full-wave rectification for three-phase equipment
rectifier
31
measures tube current
mA meter
32
wired between rectifier and x-ray tube
mA meter
33
rheostat
mA control
34
variable resistor
mA control
35
regulates the number of electrons available at the filament to produce X-ray
mA control
36
manipulated by radiorapher via mA station on the control panel
mA control
37
reduces voltage and increases current
step-down transformer
38
high current sent to heat the filament
step-down transformer
39
incoming voltage to 6-12 and 3-5 amps
step-down transformer
40
greater number of turns on the primary side compared to the secondary side
step-down transformer
41
induction motor
x-ray tube
42
thermionic emission
x-ray tube
43
DC
x-ray tube
44
electrons move at 1/2 the speed of light
x-ray tube
45
step-up transformer does what to voltage and what to amps?
increases decreases
46
what is a semiconductor?
A material that can sometimes conduct an electric current and sometimes not, depending on the voltage applied across that material.
47
what is AEC?
An electronic device designed to terminate x-ray exposure after properly exposing an image receptor
48
what is line compensation?
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
what is a capacitor?
An electric circuit device that stores electric charge.
50
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.
mA meter location
51
An electric device that contains two electrodes
diode
52
The fluctuation in the voltage applied to the x-ray tube expressed as a percentage of peak kilovoltage
voltage ripple
53
The process of changing alternating current and voltage into direct current and voltage
rectification
54
A type of transformer having a single winding
autotransformer
55
he product of voltage and current. Watt
power
56
what is radiolucent?
Allow relatively undiminished intensity of x-rays through the tabletop
57
describe the movements of a patient's couch
90 degrees to vertical so that the patient is standing; 20 degrees head-down
58
5 major controls on the control panel
On/off control, kVp selection, mA selection, time (mAs) selection, and automatic- exposure controls
59
the purpose of the autotransformer
To vary and control the amplitude of the voltage supplied to the high-voltage step-up transformer and the filament transformer.
60
how does primary voltage relate to secondary voltage in an autotransformer?
Primary voltage and secondary voltage are in direct relation to the number of turns of the transformer
61
what does the prereading kVp meter allow
The precise adjustment of the supply voltage and monitoring the kVp before the x-ray exposure
62
what is the difference between a high-voltage generator and a high-voltage transformer?
The high-voltage transformer is just one component of a high-voltage generator
63
What is the voltage ripple? - single phase - three-phase six-pulse - three-phase, twelve pulse - high frequency
- 100 - 14 - 4 - 1
64
what is the only type of high-voltage generator that can be positioned in or on the x-ray tube housing?
high-frequency generator
65
equations for computing single-phase and high-frequency phase power rating
- 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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