(1)
University of Wisconsin Hospital and Clinics, Madison, WI, USA
(2)
University of Wisconsin-LaCrosse, LaCrosse, WI, USA
Keywords
DmaxElectron gunFlattening filterGantryHounsfield unitsKlystronScattering foilWaveguideWindow levelWindow widthQuestions
1.
The Dmax of a 10 MV photon beam is:
A.
0.5 cm
B.
1.0 cm
C.
2.0 cm
D.
2.5 cm
2.
The source for microwave power in a LINAC with energies greater than 12 MeV is:
A.
Magnetron
B.
RF driver
C.
Klystron
D.
Circulating pump
3.
In a LINAC, what structure transports the microwaves from the stand to the Accelerator Structure?
A.
Klystron
B.
Accelerating waveguide
C.
Bending magnet
D.
Waveguide
4.
The cathode of the linear accelerator is the:
A.
Magnetron
B.
Electron gun
C.
Tungston target
D.
Bending magnet
5.
What is not true regarding the accelerator structure of a linear accelerator ?
A.
It is located in the stand of the linear accelerator
B.
They may be mounted vertically
C.
They may be mounted horizontally
D.
Electrons are accelerated in this component
6.
Targets in a linear accelerator are typically made of:
A.
Tungsten
B.
Lead
C.
Copper
D.
Concrete
7.
What is the average energy of a 15 MV photon beam ?
A.
3.75 MV
B.
5 MV
C.
7.5 MV
D.
15 MV
8.
The _________ sets the beam’s maximum field size .
A.
Target
B.
Bending magnet
C.
Independent jaws
D.
Primary collimator
9.
Which of the following components are in the beam for X-ray production in a LINAC ? (Choose all correct answers).
A.
Scattering foil
B.
Target
C.
Flattening filter
10.
What is moved out of the beam’s path when treating with electrons? (Choose all correct answers).
A.
Target
B.
Scattering foil
C.
Flattening filter
11.
What component of the linear accelerator is responsible for signaling the machine to shut off once the requested dose has been delivered?
A.
Pulsed power supply
B.
Ionization chamber
C.
Klystron
D.
Circulator
12.
What are the collimator jaws of the linear accelerator ?
A.
Primary collimators
B.
Secondary collimators
C.
Multileaf collimators
D.
None of the above
13.
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What component in the treatment head of the linear accelerator displays the SSD on the patient’s skin?
A.
Field-defining light
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