meaghan piretti study guide: image production
1. draw the x-ray tube
2. which side of the x-ray anode
tube is positive?
3. which side of the x-ray cathode
tube is negative?
4. what is the role of the creates an air free vacuum around the cathode and the anode
glass envelope?
5. what is the role of the prevents x-rays from being emitted throughout the exam room
tube housing?
6. what end of the tube has cathode
the filament and the fo-
cusing cup?
7. what are the types of an- stationary and rotating
odes?
8. what is the anode made tungsten-rhenium alloy
of?
9. why is tungsten with rhe- high atomic number and melting point
nium the preferred mate-
rial for the anode?
10. what is the induction mo- turns the anode without contacting the anode
tor?
11. what is a stator? activated in series to induce the turning rotor
, meaghan piretti study guide: image production
12. what does the rotor do? rotating tube shaft attached to the anode disc
13. what does the bearings low friction spheres that allow for free rotation of the rotor
do?
14. define anode heel effect decreased x-ray beam intensity on the anode side of the beam
15. why is the beam more the angle of the electron beam causes it to focus more energy on the
intense on the cathode cathode side
end?
16. if the degree of anode an- Increases
gle decreases - will that
increase or decrease the
anode heel effect?
17. define the line focus prin- the relationship between the actual focal spot on the anode and the
ciple effective focal spot that extends from the anode
18. which is larger, the actual actual focal spot
focal spot or effective fo-
cal spot?
19. where is the actual focal anode
spot located?
20. which focal spot goes to- effective focal spot
ward the patient?
, meaghan piretti study guide: image production
21. if you decrease anode an- decrease the effective focal spot size
gle (choose small focal
spot) how will that affect
the effective focal spot
size?
22. define off-focus radiation x-rays that are produced outside the intended focal spot in an x-ray
tube
23. define tube loading (heat the heat created within the x-ray tube
units)
24. what is the math formu- kVp x mA x s x waveform factor
la for tube loading (heat
units)?
25. what is the waveform fac- 1
tor of a single phase gen-
erator?
26. what is the waveform fac- 1.35
tor of a three phase six
pulse generator
27. what is the waveform 1.41
factor of a three phase
twelve pulse generator?
28. what is the waveform fac- 1.45
tor of a high frequency
generator?
29. draw the x-ray circuit
, meaghan piretti study guide: image production
30. what is the difference be- in a series circuit the current is constant and in a parallel circuit the
tween a series circuit and voltage is constant
a parallel circuit?
31. which current has the series circuit
same current flow
through all at once and is
all equal?
32. which circuit has a net- parellel circuit
work of electrical compo-
nents each connected to
the power source by a dif-
ferent path?
33. define amperes the rate at which electrons flow through the circuit
34. define voltage the force that pushes electrons through a circuit
35. define resistance the force that slows down electrons in a circuit
36. what is the incoming volt- 220 volts
age coming into the cir-
cuit?
37. what is the role of the AC supple the x-ray unit with primary or low voltage
supply?
38. what is the role of the provides the electrical connection between the external power supply
master wall switch? and the x-ray unit
1. draw the x-ray tube
2. which side of the x-ray anode
tube is positive?
3. which side of the x-ray cathode
tube is negative?
4. what is the role of the creates an air free vacuum around the cathode and the anode
glass envelope?
5. what is the role of the prevents x-rays from being emitted throughout the exam room
tube housing?
6. what end of the tube has cathode
the filament and the fo-
cusing cup?
7. what are the types of an- stationary and rotating
odes?
8. what is the anode made tungsten-rhenium alloy
of?
9. why is tungsten with rhe- high atomic number and melting point
nium the preferred mate-
rial for the anode?
10. what is the induction mo- turns the anode without contacting the anode
tor?
11. what is a stator? activated in series to induce the turning rotor
, meaghan piretti study guide: image production
12. what does the rotor do? rotating tube shaft attached to the anode disc
13. what does the bearings low friction spheres that allow for free rotation of the rotor
do?
14. define anode heel effect decreased x-ray beam intensity on the anode side of the beam
15. why is the beam more the angle of the electron beam causes it to focus more energy on the
intense on the cathode cathode side
end?
16. if the degree of anode an- Increases
gle decreases - will that
increase or decrease the
anode heel effect?
17. define the line focus prin- the relationship between the actual focal spot on the anode and the
ciple effective focal spot that extends from the anode
18. which is larger, the actual actual focal spot
focal spot or effective fo-
cal spot?
19. where is the actual focal anode
spot located?
20. which focal spot goes to- effective focal spot
ward the patient?
, meaghan piretti study guide: image production
21. if you decrease anode an- decrease the effective focal spot size
gle (choose small focal
spot) how will that affect
the effective focal spot
size?
22. define off-focus radiation x-rays that are produced outside the intended focal spot in an x-ray
tube
23. define tube loading (heat the heat created within the x-ray tube
units)
24. what is the math formu- kVp x mA x s x waveform factor
la for tube loading (heat
units)?
25. what is the waveform fac- 1
tor of a single phase gen-
erator?
26. what is the waveform fac- 1.35
tor of a three phase six
pulse generator
27. what is the waveform 1.41
factor of a three phase
twelve pulse generator?
28. what is the waveform fac- 1.45
tor of a high frequency
generator?
29. draw the x-ray circuit
, meaghan piretti study guide: image production
30. what is the difference be- in a series circuit the current is constant and in a parallel circuit the
tween a series circuit and voltage is constant
a parallel circuit?
31. which current has the series circuit
same current flow
through all at once and is
all equal?
32. which circuit has a net- parellel circuit
work of electrical compo-
nents each connected to
the power source by a dif-
ferent path?
33. define amperes the rate at which electrons flow through the circuit
34. define voltage the force that pushes electrons through a circuit
35. define resistance the force that slows down electrons in a circuit
36. what is the incoming volt- 220 volts
age coming into the cir-
cuit?
37. what is the role of the AC supple the x-ray unit with primary or low voltage
supply?
38. what is the role of the provides the electrical connection between the external power supply
master wall switch? and the x-ray unit
