Radiation Therapy Board Review
2025/2026 Exam Questions and Verified
Answers | Already Graded A+
Prophylactic cranial irradiation for ALL is administered to a total dose of:
A. 1200 cGy
B. 1800 cGy
C. 3000 cGy
D. 4500 cGy
E. 6000 cGy - 🧠 ANSWER ✔✔B. 1800 cGy
The treatment time for a field requiring 350 monitor units while the linear
acellerator dose rate is 220 units/minute is:
A. .394 minutes
B. .629 minutes
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,C. 1.59 minutes
D. 2.52 minutes - 🧠 ANSWER ✔✔C. 1.59 minutes
Placing marks on the central axis only is:
A. Sufficient for daily realignment and targeting
B. Sufficient when target margins are small
C. Adequate for treating small fields
D. Insufficient for daily realignment and targeting - 🧠 ANSWER ✔✔D.
Insufficient for daily realignment and targeting
*Marks should be placed on the central axis and along coordinate planes to
assure the patient and location target is accurately reproduced.
During total CNS irradiation, the patient is:
A. Supine with an extended chin
B. Supine with chin flexed
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,C. Prone with chin slightly extended
D. Prone with chin flexed - 🧠 ANSWER ✔✔C. Prone with chin slightly
extended
Electron contamination from high energy photon beams may result from
photon interactions with the:
A. Room air
B. Collimators
C. Bolus
D. Lucite trays - 🧠 ANSWER ✔✔B. Collimators
Lucite is often used as the material for positioning devices. One major
concern when this material is in the path of the treatment beam is:
A. Electron contamination
B. Beam attenuation
C. Decreased rigidity
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, D. Acquired radioactivity - 🧠 ANSWER ✔✔B. Beam attenuation
Advantages of networked digital image management do not include:
A. Dispersed access to images
B. Multiple users can share images
C. Physical storage space is minimized
D. Computer disk space is not an issue - 🧠 ANSWER ✔✔D. Computer disk
space is not an issue
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
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STATEMENT. ALL RIGHTS RESERVED
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2025/2026 Exam Questions and Verified
Answers | Already Graded A+
Prophylactic cranial irradiation for ALL is administered to a total dose of:
A. 1200 cGy
B. 1800 cGy
C. 3000 cGy
D. 4500 cGy
E. 6000 cGy - 🧠 ANSWER ✔✔B. 1800 cGy
The treatment time for a field requiring 350 monitor units while the linear
acellerator dose rate is 220 units/minute is:
A. .394 minutes
B. .629 minutes
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
1
,C. 1.59 minutes
D. 2.52 minutes - 🧠 ANSWER ✔✔C. 1.59 minutes
Placing marks on the central axis only is:
A. Sufficient for daily realignment and targeting
B. Sufficient when target margins are small
C. Adequate for treating small fields
D. Insufficient for daily realignment and targeting - 🧠 ANSWER ✔✔D.
Insufficient for daily realignment and targeting
*Marks should be placed on the central axis and along coordinate planes to
assure the patient and location target is accurately reproduced.
During total CNS irradiation, the patient is:
A. Supine with an extended chin
B. Supine with chin flexed
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
2
,C. Prone with chin slightly extended
D. Prone with chin flexed - 🧠 ANSWER ✔✔C. Prone with chin slightly
extended
Electron contamination from high energy photon beams may result from
photon interactions with the:
A. Room air
B. Collimators
C. Bolus
D. Lucite trays - 🧠 ANSWER ✔✔B. Collimators
Lucite is often used as the material for positioning devices. One major
concern when this material is in the path of the treatment beam is:
A. Electron contamination
B. Beam attenuation
C. Decreased rigidity
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
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, D. Acquired radioactivity - 🧠 ANSWER ✔✔B. Beam attenuation
Advantages of networked digital image management do not include:
A. Dispersed access to images
B. Multiple users can share images
C. Physical storage space is minimized
D. Computer disk space is not an issue - 🧠 ANSWER ✔✔D. Computer disk
space is not an issue
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
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
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