Diagnostic Xray Production

Question 0

The effects of making the actual focal spot appear smaller when viewed from the position of the X-ray film

Answer 0

Line focus principle

Question 1

What is the surface of the anode that is bombarded by the electron beam coming from the cathode?

Answer 1

Focal spot

Question 2

Maximum electrical and thermal tube ratings for a portable, table top unit

Answer 2

60-90 kvp

40-120 kvp

Question 3

If the angle of the anode is less than 15 degrees, the xray beam will be narrow and the image…

Answer 3

Will have good resolution

Question 4

Thicker portion should be placed under which side of the X-ray tube

Answer 4

Cathode

Question 5

The variation in intensity between the anode and cathode is

Answer 5

Heel effect

Question 6

Most common cathode failure

Answer 6

Filament evaporation

Question 7

Within an xray machine, what adjusts the incoming voltage so the primary voltage stays constant?

Answer 7

Line voltage compensator

Question 8

Purpose of ground wire

Answer 8

Alternative route for energy when broken

Question 9

X-ray machines have how many volts of energy running through them

Answer 9

220 v

Question 10

Why are 3 phase generators more efficient than single and high frequency generators?

Answer 10

Target is not subjected to low energy electrons

Question 11

What transformer provides a variable yet predetermined voltage to step up transformer

Answer 11

Autotransformer

Question 12

Auto transformer is connected to what exposure factor?

Answer 12

Kvp exposure factor

Question 13

What transformer boosts the incoming voltage to the X-ray tube

Answer 13

Step up

Question 14

What is the step up transformers purpose?

Answer 14

Transport electron stream to anode

Question 15

What transformer produces the correct temperature for the cathode filament by decreasing the voltage?

Answer 15

Step down transformer

Question 16

The step down transformer is connected to what exposure factor?

Answer 16

mA exposure factor

Question 17

High voltage circuit transformers

Answer 17

Auto and step up

Question 18

Low voltage circuit

Answer 18

Step down transformer

Question 20

Charge of cathode and anode

Answer 20

Cathode- neg

Anode- pos

Question 21

what occurs during the partial depression of the exposure pedal?

Answer 21

initiate low voltage circuit, anode begins to spin

Question 22

what occurs during the full depression of exposure pedal

Answer 22

initiates high voltage circuit, electrodes flow and produce xray

Question 23

AC vs DC

Answer 23

AC- pos and neg deflection

DC- pos deflection

Question 24

what currents do xray machines use?

Answer 24

DC

Question 25

why is DC more beneficial to us?

Answer 25

allows for shorter exposure time. important bc of movement

Question 26

switching between AC and DC currents is called?

Answer 26

rectification

Question 27

what percent of heat is produced when the electrons strike the anode target?

Answer 27

99%

Question 28

what percent of xrays are produced when the electrons strike the anode target?

Answer 28

1%

Question 29

the cathode filament and the anode target are made from what metal?

Answer 29

tungsten

Question 30

the focusing cup within the cathode is made from what metal?

Answer 30

molybdenum

Question 31

to help dissipate and absorb heat, the anode target sits in a cylindrical base made of what material?

Answer 31

copper

Question 32

what type of anode is used in small animal xray units?

Answer 32

rotating

Question 33

ideal target would have what to equal out the heat

Answer 33

high kVp, low mA