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Bushong Rad Physics > X-ray Imaging System Ch 6 > Flashcards

X-ray Imaging System Ch 6 Flashcards

1
Q

Three Principal Parts of X-ray Imaging System

A

X-ray Tube, Operating Console & High

Voltage Generator

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2
Q

It is attached to an overhead movable crane

assembly

A

Radiographic X-ray Tube

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3
Q

It is located under the examination table

A

Fluoroscopic X-ray Tube

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4
Q

It must be transparent to x-rays as possible

A

Examination Table

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5
Q

Fluoroscopic Table Tilt

A

Tilt: 90 to the foot/30 to the head

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6
Q

It is housed in an equipment cabinet

positioned against a wall

A

High Voltage Generator

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7
Q

It is used to control the x-ray tube current &

voltage applied to the x-ray tube

A

Operating Console

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8
Q

The intensity of the x-ray beam (mAs)

A

Radiation Quantity

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9
Q

The penetrability of the x-ray beam (kVp)

A

Radiation Quality

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10
Q

It measures the voltage provided to the x-ray

imaging system

A

Line Compensator

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11
Q

supplies a precise voltage to the

filament circuit & high-voltage circuit

A

Autotransformer

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12
Q

It conducts the input power to the

autotransformer

A

Primary Connection

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13
Q

It states that the voltage receive & provide
by the transformer is directly proportional to
the number of turns

A

Autotransformer Law

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14
Q

Autotransformer Law Formula

A

Vs/Vp = Ns/Np

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15
Q

Adjustment of Kilovoltage Peak (kVp)

A

Major & minor kVp

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16
Q

It determines the quality of the x-ray beam

A

kVp

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17
Q

It reads voltage (not kVp)

A

kVp Meter

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18
Q

It allows the voltage to be monitored before

an exposure

A

Prereading kVp Meter

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19
Q

It is measured in milliamperes

A

X-ray Tube Current

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20
Q

It determines the number of electrons

emitted by the filament

A

Filament Temperature

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21
Q

It controls the filament temperature

A

Filament Current

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22
Q

It controls x-ray tube current

A

Filament Circuit

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23
Q

A phenomenon of the space charge that
makes it difficult for subsequent electrons to
be emitted by the filament because of
electrostatic repulsion

A

Space Charge Effect

24
Q

Electron cloud near the filament

A

Space Charge

25
Q

The release of electrons from a heated

filament

A

Thermionic Emission

26
Q

It is used to reduce the voltage to a value
that corresponds to the selected
milliamperage

A

Precision Resistor

27
Q

Design in which exposure factors are
adjusted automatically to the highest mA at
the shortest exposure time allowed by the
high-voltage generator

A

Falling Load Generator

28
Q 
The product of x-ray tube current (mA) & 
exposure time (s)
A

mAs

29
Q

It monitors the x-ray tube current

A

mA Meter

30
Q

It terminates an exposure after a prescribed

time (6 s)

A

Guard Timer

31
Q

It consists of an electronic device

A

Timer Circuit

32
Q

Four Types of Timing Circuits

A

Synchronous Timer, Electronic Timer, mAs

Timer & Automatic Exposure Control

33
Q

A precision device designed to drive a shaft

at precisely 60 revolution per second

A

Synchronous Timer

34
Q 
Most sophisticated, most complicated & 
most accurate (as small as 1 ms)
A

Electronic Timer

35
Q

Most exposure timers are electronic & are

controlled by a…

A

microprocessor

36
Q

A device that measure the quantity of

radiation that reaches the image receptor

A

Automatic Exposure Control (AEC)

37
Q

It is used to check timer accuracy (as short

as 1 ms)

A

Solid-state Detectors

38
Q

It increases the output voltage from the

autotransformer to the kVp necessary for xray production

A

High Voltage Generator

39
Q

Three Primary Parts if Generator

A

High Voltage Transformer, Filament

Transformer & Rectifiers

40
Q

The ratio of the number of secondary

windings to the number of primary windings

A

Turns Ratio

41
Q

It ensures that electrons flow from cathode

to anode only

A

Voltage Rectification

42
Q

The process of converting alternating

current (AC) to direct current (DC)

A

Rectification

43
Q

An electronic device that allows current

flow in only one direction

A

Rectifier

44
Q

An electronic device that contains two

electrodes

A

Diode

45
Q

It replaced by solid-state rectifier

A

Valve Tube

46
Q

2 types of Semiconductor

A

P-type and n-type

47
Q

The voltage is not allowed to swing
negatively during the negative half of its
cycle

A

Half-Wave Rectification

48
Q

The negative half-cycle corresponding to the

inverse voltage is reverse

A

Full-Wave Rectification

49
Q

It results in a pulsating x-ray beam

A

Single-Phase Power

50
Q

The voltage impressed across the x-ray tube

is nearly constant

A

Three-Phase Power

51
Q

Starting an exposure

A

Initiation Time

52
Q

Ending an exposure

A

Extinction Time

53
Q

It produces a nearly constant potential

voltage waveform

A

High Frequency Generator

54
Q

A high-speed switchers or choppers that

convert DC into a series of square pulses

A

Inverter Circuit

55
Q

LTube voltage falls during exposure

A

Capacitor Discharge Generator

56
Q

An automatic lead beam stopper

A

Grid-Controlled X-ray Tube

Bushong Rad Physics (8 decks)

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