Meaghan Piretti’s Study Guide
Questions and Guide Answers
100% Verified Graded A+
What side of the x-ray tube positive
Answer: Anode
What side of the x-ray tube is negative
Answer: Cathode
What is the role of the glass envelope
Answer: Containment and maintains the vacuum
What is the role of the tube housing
Answer: Prevents leakage and insulates
What end of the tube has the filament and focusing cup
Answer: Cathode
What are the types of anodes
Answer: Rotating and Stationary
What is the anode made of
,Answer: Tungsten
Why is Tungsten the chosen material for the anode
Answer: Has a high atomic number meaning it has a high melting point
Describe the induction motor
Answer: Stator on the outside and Rotor on the inside
What is a stator
Answer: Electric motor that turns the rotor at high speed
Rotating magnetic field when energized
What does the rotor do
Answer: Spins the anode allowing heat to be spread out across a larger area
What do the bearings of the induction motor do
Answer: Support and enables rotation
Define Anode heel effect
Answer: Variation in x-ray intensity between anode and cathode sides of the tube
What side of the x-ray tube has the more intense beam
Answer: Cathode
Why is the beam more intense on the cathode end
Answer: X-rays produced deeper within the anode must pass through more material
which absorbs some of the beam, the absorption reduces intensity on the anode side
If the degree of anode angle decreases what will happen to the anode heel effect
,Answer: It increases, a smaller angle means x-rays have to travel through more
anode material to exit
Define the line focus principle
Answer: Large Actual focal spot that spreads heat while maintaining a small effective
focal spot for better image detail
What is larger, the actual focal spot or effective
Answer: Actual
Where is the actual focal spot located
Answer: On the surface of the anode target
Which focal spot goes towards the pt, actual or effective
Answer: Effective
If you decrease anode angle (choose small focal spot) how will that affect the
effective focal spot size
Answer: It also decreases
Define off focus radiation
Answer: Radiation produced outside the actual focal spot which causes blurred edges
or ghost images
Define tube loading
Answer: The amount of heat energy generated in the x-ray tube during an exposure,
heat units
, What is the formula for heat units
Answer: HU= kVp x mA x time (s) x wave form factor
What is the average wave form factor
Answer: 1.4
What is the wave form factor for single phase
Answer: 1
What is the wave form factor for 3 phase 6 pulse
Answer: 1.35
What is the wave form factor for 3 phase 12 pulse
Answer: 1.41
What is the wave form factor for high frequency
Answer: 1.45
Describe the difference between series and parallel circuits
Answer: Series: 1 path, if 1 breaks the entire circuit stops like x-mas lights
Parallel: multiple paths, other branches still work even if one breaks
Define amperes
Answer: Aka Amps
a measure of the flow of electric current in a circuit
Define voltage
Questions and Guide Answers
100% Verified Graded A+
What side of the x-ray tube positive
Answer: Anode
What side of the x-ray tube is negative
Answer: Cathode
What is the role of the glass envelope
Answer: Containment and maintains the vacuum
What is the role of the tube housing
Answer: Prevents leakage and insulates
What end of the tube has the filament and focusing cup
Answer: Cathode
What are the types of anodes
Answer: Rotating and Stationary
What is the anode made of
,Answer: Tungsten
Why is Tungsten the chosen material for the anode
Answer: Has a high atomic number meaning it has a high melting point
Describe the induction motor
Answer: Stator on the outside and Rotor on the inside
What is a stator
Answer: Electric motor that turns the rotor at high speed
Rotating magnetic field when energized
What does the rotor do
Answer: Spins the anode allowing heat to be spread out across a larger area
What do the bearings of the induction motor do
Answer: Support and enables rotation
Define Anode heel effect
Answer: Variation in x-ray intensity between anode and cathode sides of the tube
What side of the x-ray tube has the more intense beam
Answer: Cathode
Why is the beam more intense on the cathode end
Answer: X-rays produced deeper within the anode must pass through more material
which absorbs some of the beam, the absorption reduces intensity on the anode side
If the degree of anode angle decreases what will happen to the anode heel effect
,Answer: It increases, a smaller angle means x-rays have to travel through more
anode material to exit
Define the line focus principle
Answer: Large Actual focal spot that spreads heat while maintaining a small effective
focal spot for better image detail
What is larger, the actual focal spot or effective
Answer: Actual
Where is the actual focal spot located
Answer: On the surface of the anode target
Which focal spot goes towards the pt, actual or effective
Answer: Effective
If you decrease anode angle (choose small focal spot) how will that affect the
effective focal spot size
Answer: It also decreases
Define off focus radiation
Answer: Radiation produced outside the actual focal spot which causes blurred edges
or ghost images
Define tube loading
Answer: The amount of heat energy generated in the x-ray tube during an exposure,
heat units
, What is the formula for heat units
Answer: HU= kVp x mA x time (s) x wave form factor
What is the average wave form factor
Answer: 1.4
What is the wave form factor for single phase
Answer: 1
What is the wave form factor for 3 phase 6 pulse
Answer: 1.35
What is the wave form factor for 3 phase 12 pulse
Answer: 1.41
What is the wave form factor for high frequency
Answer: 1.45
Describe the difference between series and parallel circuits
Answer: Series: 1 path, if 1 breaks the entire circuit stops like x-mas lights
Parallel: multiple paths, other branches still work even if one breaks
Define amperes
Answer: Aka Amps
a measure of the flow of electric current in a circuit
Define voltage
