Xray tube Part 2

Question 0

Principal parts of induction motor

Answer 0

Rotor

Stator

Question 1

Used to turn the anode

Answer 1

Induction motor

Question 2

Comsisting of series of electromagnets equally spaced around the neck of the tube

Answer 2

Stator

Question 3

Electromechanical coil of copper wire that is connected to a power supply

Answer 3

Stator

Question 4

Sends pulses of energy to the stator

Answer 4

Rotor controller

Question 5

Wire that transfer rotor controller power to stator

Answer 5

Stator cord

Question 6

Shaft inside the enclose made of copper and soft iron

Answer 6

Rotor

Question 7

Production of voltage across a conductor moving through a magnetic field

Answer 7

Electromagnetic induction

Question 8

This allows the rotor to accelerate to its designated rpm while the filament is heated

Answer 8

Exposure switch

Question 9

Where the high voltage electrons hit the anode from which xrays ate emitted

Answer 9

Focal spot / focal point / focus / target

Question 10

Area on the target that is exposed to electrons

Answer 10

Actual focal spot

Question 11

The area projected onto the patient

Answer 11

Effective focal spot

Question 12

The ______ the focal spot , tge better the spatial resolution of the image

Answer 12

Smaller

Question 13

Incorporated into the xray tube targets allowing a large area for heating w/ small focal spot

Answer 13

Line focus principle

Question 14

Angling the target is also

Answer 14

Line focus principle

Question 15

Diagnosing tube target angles

Answer 15

5 to 20 deg

Question 16

Used to reduced the effective area of the focal spot

Answer 16

Line focus principle

Question 17

As the angle decreases, effective focal spot

Answer 17

Decreases

Question 18

Electrons can rebound and interact with other areas

Answer 18

Off focal radiation

Question 19

Diaphragm is placed between the tube and the collimator to reduce off focal rays

Answer 19

Control off focal radiation

Question 20

Produces two focal spot sizes because of two different target angles on the anode

Answer 20

Biangular targets

Question 21

The radiation intensity on the cathode side of the xray field is greater that the on the anode side

Answer 21

Anode heel effect

Question 22

Primarily under the control of rad tech

Answer 22

Xray tube life

Question 23

Three forms of cooling

Answer 23

Radiation
Conduction
Convection

Question 24

The anode may glow red hot

Answer 24

Radiation

Question 25

Heat is conducted through molybdenum

Answer 25

Conduction

Question 26

Heated glass enclosure raises temperature of the oil bath

Answer 26

Convection

Question 27

Maximum radiographic techniques should never be applied to

Answer 27

Cold anode

Question 28

Xray tube failure

Answer 28

``` Thermal characteristics Maintain anode elevated temperature Bearing damage Prolonged heat Electron arcing from filament ```

Question 29

Chart that guide radtech in use of xray tubes

Answer 29

Xray tube rating charts

Question 30

3 types of xray rating charts

Answer 30

Radiographic rating chart Anode cooling chart Housing cooling chart

Question 31

Comveys which radiographic technoque is safe ang unsafe

Answer 31

Radiographic rating chart

Question 32

Guide the most common technical factor combination

Answer 32

Radiographic rating chart

Question 33

Anode has a limited capacity for storing heat

Answer 33

Anode cooling chart

Question 34

Thermal energy in xray is measured

Answer 34

Heat units

Question 35

Single phase formula

Answer 35

HU = kVp x ma x s

Question 36

Three phase / high frequency

Answer 36

HU = 1.4 x kVp x mA x s

Question 37

Used to determine the length of the time for complete cooling

Answer 37

Anode cooling chart

Question 38

It would take ____ to cool the anode

Answer 38

15 mins

Question 39

Tube housing have capacity of

Answer 39

1 to 1.5 million HU

Question 40

Anode has the capacity of

Answer 40

350,000 HU

Question 41

Complete cooling of the housing

Answer 41

1 to 2 hours

Question 42

Calculation of time necessary for the housing to cool

Answer 42

Housing cooling chart

Question 43

Extending tube life

Answer 43

``` Warm up the anode Dont hold the rotor switch unnecessarily Lower mAs Lower speed rotor Dont make repeated exposure Dont rotor the tube housing rapidly Dont use a tube when you hear rotor bearings ```