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Radiation Therapy Board Review Exam Questions with 100% Correct Solutions Latest
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Radiation Therapy Board Review ExamQuestions with 100% Correct Solutions
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In the treatment of seminoma, an external testicular shield should be used for the remaining
testicle. This is Important since the TD 5/5 for the testis is as low as:
A. 1 Gy
B. 10 Gy
C. 20 Gy
D. 40 Gy - ANSWER A. 1 Gy
Which of the following cannot produce a 3 dimensional image?
A. MRI
B. CT
C. Ultrasound
D. Electronic portal imaging - ANSWER D. Electronic portal imaging
A procedure in which an implant is made using a trocar, with radioactive sources introduced
into the trocar and then the trocar is removed is called:
A. Self-attenuation
B. Interstitial preloading
C. Intracavitary microloading
D. Interstitial afterloading - ANSWER D. Interstitial afterloading
,The precise daily reproduction of patient position depends on:
1. Patient age
2. Type of treatment machine
3. Anatomical site treated
4. Patients overall health
A.1&2
B.2&3
C.3&4
D.1&4-ANSWERC.3&4
The linear scales on the treatment table are used as an aid for:
A. Translation of patient position on the table
B. Verifying filament voltage
C. Verifying gantry readout accuracy
D. Documentation of treatment dose - ANSWER A. Translation of patient position on the table
Compared to water, the density of bone is:
A. 1.00
B. 1.65-1.85
C. 0.33-0.35
D. 0.2-0.26 - ANSWER B. 1.65-1.85
,If the width of the vertebral body is 5.3 cm and measures 7.5 cm on the portal verification
film, the magnification factor is:
A. 0.706
B. 1.0
C. 1.41
D. 2.00 - ANSWER C. 1.41
7.5/5.3 = 1.41
A patient's treatment will be 2.54 minutes. How many seconds is this?
A. 174
B. 152.4
C. 114
D. 254.0 - ANSWER B. 152.4
(60/1)(x/2.54)
1x = 60(2.54)
X = 152.4
How many cobalt sources are contained in the gamma knife unit?
A. 25
B. 105
, C. 201
D. 280 - ANSWER C. 201
Which of the following is a nonmalignant condition treated by stereotactic radiosurgery?
A. Nasopharyngeal tumors
B. Medulloblastoma
C. Astrocytoma
D. Arteriovenous malformation - ANSWER D. Arteriovenous malformation
The distance between the entrance and exit points for parallel opposed fields is called the:
A. Source to skin distance
B. Source to axis distance
C. Interfield distance
D. Source to tray distance - ANSWER C. Interfield distance
A lateral portal verification shows the spinal cord to be at a measured depth of 9 cm from
the skin surface. If the film magnification is 1.5, the actual depth of the cord is:
A. 4 cm
B. 6 cm
D. 9 cm
E. Not enough information - ANSWER B. 6 cm
9/1.5 = 6
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