X Ray Imagining System

Front 1

How are most imaging systems identified

Back 1

Energy of x rays or purpose of the machine

Front 2

Imagining tables

Back 2

Uniform in thickness and as transparent as possible

Front 3

Imagining tables made of

Back 3

Carbon fiber

Front 4

Carbon fiber

Back 4

Strong and absorb little radiation

Front 5

Fluoroscopic tables

Back 5

90/30 degree of tilt

Front 6

Bucky slit cover

Back 6

Pops up when you move Bucky to feet

Front 7

Principle of an imaging sustem

Back 7

Operating console

High voltage generator

X Ray tube

Front 8

Operating console consist of

Back 8

Controls

Quantity

Quality

Front 9

Controls

Back 9

Voltage and current

Front 10

Quantity

Back 10

mAs # of electrons and time

Front 11

Quality

Back 11

Kvp penetration or half valve layer

Front 12

Half valve layer

Back 12

Amount of material needed to reduce the original beam to 1/2 the intensity

Front 13

Line compensation

Back 13

Provides the 220 volts consistently

Front 14

X Ray needs 220 volts to operate but the power company can't provide that consistently what's used

Back 14

Line compensation

Front 15

220 volts from power company varies by

Back 15

5%

Front 16

Autotransformer

Back 16

Increase volts decrease current

Front 17

Prereading voltmeter on the autotransformer moniters the voltage before exposure

Back 17

Kvp adjustment

Front 18

Minimum change needed to see a kvp change

Back 18

By 4

Front 19

Major by 10 or minor by 2

Back 19

Kvp adjustment

Front 20

mA control

Back 20

Tube current (# if electrons boil off)

Front 21

Tube current happens in

Back 21

Filament circuit

Front 22

Fixed mA

Back 22

Only certain mA can be selected

Front 23

Falling load

Back 23

Uses max mA with minimum time

Front 24

Mechanical timer

Back 24

Control by tech

In some portables and dental units

No more than .25 seconds

Front 25

Dial turns a spring when exposure button is pushed the spring unwinds when it is done unwinding the time is up

Back 25

Mechanical timer

Front 26

Synchronous timer

Back 26

Control by tech

Turns at same rate as the generator

Time increments of 1/60

Front 27

Can't be used for serial exposure b/c timer has to be reset for each exposure

Back 27

Synchronous timer

Front 28

Electronic timer

Back 28

Control by tech

Cath lab and interventional

Front 29

Very accurate wide range of time intervals rapid exposures

Back 29

Electronic timer

Front 30

mAs timer

Back 30

Control by tech

Terminates when predetermined aNd is reached

Front 31

AEC timers

Back 31

Not controlled by tech

Front 32

Phototimer

Back 32

Use light from the intensifying screen to know when to terminate exposure

Front 33

Ionization chamber

Back 33

When enough predetermined amount of ionization occurs exposure terminates

Front 34

Phototimer and ionization chambers

Back 34

Automatic exposure control (AEC)

Front 35

High voltage transformer is the

Back 35

Step up transformer

Front 36

Increase voltage from the autotransformer into kvp needed

Back 36

High voltage transformer

Front 37

Transformer only works with

Back 37

AEC

Front 38

Change AC to DC

Back 38

Rectifiers

Front 39

Vacuum tube rectifer

Solid state diode

Back 39

Types of rectifers

Front 40

DC is needed so electrons flow to

Back 40

Anode

Front 41

Apply voltage to make the anode really positive so electrons will be attracted and pull across

Back 41

Vacuum tube rectifiers

Front 42

Rectifier made of

Back 42

Silicon

Front 43

Voltage apples to the Positive side which pulls electrons across the PN junction into the holes in anode sides

Back 43

Solid state rectifers

Front 44

Remove negative cycle only left with positive cycle

Back 44

Half wave rectification

Front 45

Need to 2x more exposure time

Back 45

Half wave recertification

Front 46

Flip negative to a positive

Back 46

Full wave rectification

Front 47

Continuely flow of electrons

Back 47

Full wave rectification

Front 48

Single phase machine

Back 48

Full wave rectification

Front 49

Never drops to zero

Back 49

Three phase

Front 50

So many waves at the same time

Back 50

High frequency

Front 51

Single phase voltage ripple

Back 51

100%

Front 52

3 phase 6 pulse

Back 52

14% drop

Front 53

3 phase 12 pulse

Back 53

4% drop

Front 54

High frequency

Back 54

1% drop

Front 55

Lower voltage ripple equals

Back 55

Greater quantity and quality of the beam

Front 56

Battery operated mobile units

Back 56

Keeps a charge no leakage

Front 57

Type of mobile into that has to be charged after each x ray

Back 57

Capacitor discharge generator

Front 58

Leakage radiation

Use lead stopper to prevent leakage radiation

Back 58

Capacitor discharge generator

Front 59

Power rating

Back 59

Amp x volts divided by 1000

Front 60

Power rating single phase

Back 60

Amp x volts divided by 1000 then multiple by .7