Diagnostic X-Ray Production

Question 1

This is located near the control panel

Answer 1

On/Off Switch

Question 2

This is mounted at eye level within reach of the x-ray generator

Answer 2

Wall switch

Question 3

This keeps electricity constant in clinic while taking x-rays
Connected through kVp switch and has a method for increasing or decreasing incoming voltage

Answer 3

Line Voltage Compensator

Question 4

Main power supply to the x-ray machine

Answer 4

Circuit breakers

Question 5

Absorbs electrons and redirects the current

Answer 5

Ground

Question 6

Current in radiographic generators

Answer 6

Milliamperage

Question 7

How much voltage is in most houses?

Answer 7

110 v

Question 8

How much voltage does an x-ray machine need?

Answer 8

220 v

Question 9

How many lines does an x-ray machine use?

Answer 9

2 110v and 1 ground line

Question 10

These are used to increase the potential power of the electrical supply

Answer 10

Generators

Question 11

This type of generator has a low power capacity

Answer 11

Single phase

Question 12

This type of generator is a step-up from single phase, but less powerful than the three phase

Answer 12

High Frequency Generator

Question 13

This generator has powerful and shorter exposure times and tube utilization is more efficient

Answer 13

Three Phase Generator

Question 14

An apparatus for changing electrical energy at one voltage and current to electrical energy of another voltage and current through magnetic energy
Receives power from incoming lines and transforms the power to the x-ray tube

Answer 14

Transformers

Question 15

3 types of transformers found in an x-ray circuit

Answer 15

1. Autotransformer
2. High-tension transformer
3. Filament transformer

Question 16

This transformer determines how much voltage goes into step-up transformer

Answer 16

Autotransformer

Question 17

This type of transformer takes incoming volts and turns it into 1000s of volts
220v ->125,000 volts

Answer 17

High Voltage Transformer

Question 18

The high voltage transformer is AKA

Answer 18

Step-up transformer

Question 19

This transformer decreases incoming volts going to the filament

Answer 19

Filament transformer

Question 20

The Filament transformer is AKA

Answer 20

Step-down Transformer

Question 21

The voltage reaching the step-down transformer is determined by this setting on the x-ray machine

Answer 21

mA

Question 22

2 circuits in an x-ray machine

Answer 22

High Voltage and Low voltage

Question 23

This type of circuit provides electrical potential to transport electrons from the cathode to the anode
Contains: Autotransformer and Step-up transformer

Answer 23

High Voltage circuit

Question 24

The high voltage circuit is controlled by which setting?

Answer 24

kV

Question 25

This circuit provides electricity/amperage to heat the filament Contains: Step-down transformer

Answer 25

Low Voltage (filament) circuit

Question 26

The Low voltage circuit is controlled by this setting

Answer 26

mA

Question 27

This is used to control the length of exposure on the control panel

Answer 27

Time Switch

Question 28

How many times do you use the exposure switch?

Answer 28

1 partial depression | 1 full depression

Question 29

This illuminates when exposure is made

Answer 29

Warning light

Question 30

The x-ray tube houses what two structures?

Answer 30

Cathode and Anode

Question 31

The cathode has a ______ charge

Answer 31

negative

Question 32

The anode has a _______ charge

Answer 32

positive

Question 33

What does the oil around the glass casing of an x-ray tube do?

Answer 33

Dissipates heat

Question 34

The x-ray tube is primarily

Answer 34

99% heat, 1%x-ray

Question 35

This is positioned opposite of the anode in an x-ray tube and contains 2 filaments

Answer 35

Cathode

Question 36

What are the filaments in the cathode made of?

Answer 36

Tungsten

Question 37

What is the focusing cup of the cathode made of?

Answer 37

Molypdenum

Question 38

Themionic emission can be described as

Answer 38

Boiling off electrons

Question 39

This mechanism in the x-ray tube receives electrons from the cathode and transmits them back to the high-voltage generator

Answer 39

Anode

Question 40

What is the anode typically made of?

Answer 40

Tungsten or tungsten molybdenum alloy

Question 41

2 types of anodes

Answer 41

1. stationary | 2. rotating

Question 42

Which type of anode produces a more detailed radiograph?

Answer 42

rotating

Question 43

What type of anode is found in a table top machine?

Answer 43

Rotating

Question 44

What type of anode is found in a portable machine (lg. animal or dental)?

Answer 44

Stationary

Question 45

This turns the rotating anode

Answer 45

Rotor circuit

Question 46

How fast does the rotor circuit spin the anode?

Answer 46

3200-3600 rpms

Question 47

This is the area that is perpendicular to the surface of the target

Answer 47

Actual focal spot

Question 48

This is the area projected out of the tube toward the patient

Answer 48

Effective focal spot

Question 49

This describes how electrons interact with the anode and change direction, so the x-rays are directed at the patient

Answer 49

Line focus principle

Question 50

What is the typical angle of an anode?

Answer 50

11 degrees

Question 51

This can enlarge the effective focal spot, making the quality of radiographs decrease from too many exposures in a short period of time

Answer 51

Heat dissipation

Question 52

Too much heat can lead to this damage to the anode

Answer 52

pitting

Question 53

This indicated the x-ray tube limits based on mA, kVp, and time Expressed in kilowatts

Answer 53

Tube Rating Chart

Question 54

Portable units can usually handle how much kVp?

Answer 54

60-90

Question 55

Table top units can usually handle how much kVp?

Answer 55

40-120

Question 56

This relates to the radiation intensity is greater on the cathode side than the anode side

Answer 56

Anode Heel effect

Question 57

Most common x-ray tube failure

Answer 57

Cathode failure

Question 58

What causes cathode failure in an x-ray tube?

Answer 58

Filament destruction/overheat