X-ray Imaging System Ch 6

Question 1

Three Principal Parts of X-ray Imaging System

Answer 1

X-ray Tube, Operating Console & High

Voltage Generator

Question 2

It is attached to an overhead movable crane

assembly

Answer 2

Radiographic X-ray Tube

Question 3

It is located under the examination table

Answer 3

Fluoroscopic X-ray Tube

Question 4

It must be transparent to x-rays as possible

Answer 4

Examination Table

Question 5

Fluoroscopic Table Tilt

Answer 5

Tilt: 90 to the foot/30 to the head

Question 6

It is housed in an equipment cabinet

positioned against a wall

Answer 6

High Voltage Generator

Question 7

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

voltage applied to the x-ray tube

Answer 7

Operating Console

Question 8

The intensity of the x-ray beam (mAs)

Answer 8

Radiation Quantity

Question 9

The penetrability of the x-ray beam (kVp)

Answer 9

Radiation Quality

Question 10

It measures the voltage provided to the x-ray

imaging system

Answer 10

Line Compensator

Question 11

supplies a precise voltage to the

filament circuit & high-voltage circuit

Answer 11

Autotransformer

Question 12

It conducts the input power to the

autotransformer

Answer 12

Primary Connection

Question 13

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

Answer 13

Autotransformer Law

Question 14

Autotransformer Law Formula

Answer 14

Vs/Vp = Ns/Np

Question 15

Adjustment of Kilovoltage Peak (kVp)

Answer 15

Major & minor kVp

Question 16

It determines the quality of the x-ray beam

Answer 16

kVp

Question 17

It reads voltage (not kVp)

Answer 17

kVp Meter

Question 18

It allows the voltage to be monitored before

an exposure

Answer 18

Prereading kVp Meter

Question 19

It is measured in milliamperes

Answer 19

X-ray Tube Current

Question 20

It determines the number of electrons

emitted by the filament

Answer 20

Filament Temperature

Question 21

It controls the filament temperature

Answer 21

Filament Current

Question 22

It controls x-ray tube current

Answer 22

Filament Circuit

Question 23

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

Answer 23

Space Charge Effect

Question 24

Electron cloud near the filament

Answer 24

Space Charge

Question 25

The release of electrons from a heated | filament

Answer 25

Thermionic Emission

Question 26

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

Answer 26

Precision Resistor

Question 27

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

Answer 27

Falling Load Generator

Question 28

``` The product of x-ray tube current (mA) & exposure time (s) ```

Answer 28

mAs

Question 29

It monitors the x-ray tube current

Answer 29

mA Meter

Question 30

It terminates an exposure after a prescribed | time (6 s)

Answer 30

Guard Timer

Question 31

It consists of an electronic device

Answer 31

Timer Circuit

Question 32

Four Types of Timing Circuits

Answer 32

Synchronous Timer, Electronic Timer, mAs | Timer & Automatic Exposure Control

Question 33

A precision device designed to drive a shaft | at precisely 60 revolution per second

Answer 33

Synchronous Timer

Question 34

``` Most sophisticated, most complicated & most accurate (as small as 1 ms) ```

Answer 34

Electronic Timer

Question 35

Most exposure timers are electronic & are | controlled by a...

Answer 35

microprocessor

Question 36

A device that measure the quantity of | radiation that reaches the image receptor

Answer 36

Automatic Exposure Control (AEC)

Question 37

It is used to check timer accuracy (as short | as 1 ms)

Answer 37

Solid-state Detectors

Question 38

It increases the output voltage from the | autotransformer to the kVp necessary for xray production

Answer 38

High Voltage Generator

Question 39

Three Primary Parts if Generator

Answer 39

High Voltage Transformer, Filament | Transformer & Rectifiers

Question 40

The ratio of the number of secondary | windings to the number of primary windings

Answer 40

Turns Ratio

Question 41

It ensures that electrons flow from cathode | to anode only

Answer 41

Voltage Rectification

Question 42

The process of converting alternating | current (AC) to direct current (DC)

Answer 42

Rectification

Question 43

An electronic device that allows current | flow in only one direction

Answer 43

Rectifier

Question 44

An electronic device that contains two | electrodes

Answer 44

Diode

Question 45

It replaced by solid-state rectifier

Answer 45

Valve Tube

Question 46

2 types of Semiconductor

Answer 46

P-type and n-type

Question 47

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

Answer 47

Half-Wave Rectification

Question 48

The negative half-cycle corresponding to the | inverse voltage is reverse

Answer 48

Full-Wave Rectification

Question 49

It results in a pulsating x-ray beam

Answer 49

Single-Phase Power

Question 50

The voltage impressed across the x-ray tube | is nearly constant

Answer 50

Three-Phase Power

Question 51

Starting an exposure

Answer 51

Initiation Time

Question 52

Ending an exposure

Answer 52

Extinction Time

Question 53

It produces a nearly constant potential | voltage waveform

Answer 53

High Frequency Generator

Question 54

A high-speed switchers or choppers that | convert DC into a series of square pulses

Answer 54

Inverter Circuit

Question 55

LTube voltage falls during exposure

Answer 55

Capacitor Discharge Generator

Question 56

An automatic lead beam stopper

Answer 56

Grid-Controlled X-ray Tube