(1)
University of Wisconsin Hospital and Clinics, Madison, WI, USA
(2)
University of Wisconsin-LaCrosse, LaCrosse, WI, USA
Keywords
ContrastForward planningHinge angleInverse planningImmobilization devicekVpmAMayneord’s factorMultileaf collimatorsPercent depth dosePositioning deviceTissue-air ratioQuestions
1.
Which of the following is a negative contrast agent ?
A.
Air
B.
Iodine
C.
Barium sulfate
D.
Nonionic venous contrast
2.
Which of the following is not true regarding iodine contrast ?
A.
Can be administered intravenously
B.
Kidney function must be checked prior to administration
C.
Is ionic only
D.
Patients allergic to shellfish should not receive iodine contrast
3.
Prior to the administration of intravenous contrast , you should assess the patient for:
A.
Shellfish allergy
B.
Lung function
C.
Joint pain
D.
GI complications
4.
The hyoid bone is located at what vertebral level ?
A.
C1
B.
C3
C.
T1
D.
T3
5.
The SSN corresponds to vertebral level :
A.
C3
B.
T3
C.
T6
D.
L3
6.
An example of a positioning device is:
A.
Thermoplastic mask
B.
Chemical mold
C.
Head holder
D.
Vacuum mold
7.
What positioning device is used to move a patient’s small bowel out of pelvic treatment fields ?
A.
Shoulder assistance straps
B.
Bellyboard
C.
Wingboard
D.
Thermoplastic device
8.
Thermoplastic immobilization devices are used to immobilize the:
A.
Head and neck
B.
Chest
C.
Abdomen
D.
Pelvis
9.
When obtaining images through conventional simulation, what is true regarding mA?
A.
Controls contrast of the image
B.
Represents the quality of the beam
C.
Controls density of the image
D.
All of the above are true
10.
What is not a step of CT simulation ?
A.
Scanning the area of interest per physician order
B.
Imaging with slices of 2–8 mm
C.
Taking orthogonal images
D.
Ensuring the patient anatomy and simulation marks are included in field of view as the image is reconstructed.
11.
After CT simulation, what must be documented by the radiation therapist ?
A.
Gantry angle
B.
Collimator angle
C.
Field size
D.
Patient setup
12.
What is not included in the CTV ?
A.
GTV
B.
Margin for motion
C.
Microscopic disease
D.
All of the above are included in the CTV
13.
What volume accounts for the patient’s physiologic movement , such as breathing?
A.
Clinical target volume
B.
Internal margin
C.
Gross target volume
D.
Motion volume
14.
What term describes critical structures in or near the treatment field ?
A.
Internal target volume
B.
Organs at risk
C.
Irradiated volume
D.
Internal margin
15.
Which of the following is true regarding the forward planning technique?
A.
Plan is optimized after fields are designed
B.
Computer design treatment fields based on set criteria
C.
Is used for IMRT planning
D.
Is only used for brachytherapy planning.
16.
Which of the following are considered when designing fields and beam arrangements ? (Choose all correct answers).
A.
Total dose
B.
Beam energy
C.
Patient setup
17.
Which of the following tumors would best be treated with an arc treatment ?
A.
Central lung tumor
B.
Inflammatory breast cancer
C.
Ewings sarcoma
D.
Nasopharyngeal tumor
18.
Which of the following beam modifying devices would not be used to compensate for missing tissue in a patient?
A.
Cerrobend blocks
B.
Bolus
C.
Compensating filters
D.
Wedges
19.
Blocks are ____ HVL thick .
A.
1
B.
3
C.
5
D.
7
20.
Multileaf collimators (MLC) are made of:
A.
Lipowitz metal
B.
Tungsten
C.
Lead
D.
Brass
21.
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What device would be used in order to compensate for missing tissue as well as increase the dose to the skin?
A.
Compensating filter
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