1
, 2
Target Volume Delineation and Field
Setup: A Practical Guide for
Conformal and Intensity-Modulated
Radiation Therapy (Practical Guides
in Radiation Oncology) –Test Bank
Second Edition (2022)
Chapters
1. Nasopharyngeal Carcinoma
2. Oropharyngeal Carcinoma
3. Stereotactic Body Radiotherapy for Cancers of the Head and Neck Cancer
4. Larynx Cancer
5. Hypopharyngeal Carcinoma
6. Oral Cavity Cancers
7. Nasal Cavity and Paranasal Sinus Tumors
8. Major Salivary Glands
9. Thyroid Cancer
10. Squamous Cell Carcinoma of Unknown Primary in the Head and Neck
11. Early Breast Cancer
12. Regional Lymph Node Irradiation for Breast Cancer
13. Lung Cancer
14. Esophageal Cancer
15. Gastric Cancer
16. Pancreatic Cancer
17. Hepatocellular Carcinoma
18. Rectal Cancer
, 3
19. Anal Cancer
20. Postoperative Therapy for Cervical, Vaginal, and Endometrial Cancer
21. Definitive Therapy for Cervical, Vaginal, and Endometrial Cancer
22. Image-Guided Brachytherapy
23. Vulvar Cancer
24. Advanced Technologies and Treatment Techniques for Gynecologic
Malignancies
25. Prostate Adenocarcinoma
26. Bladder Cancer
27. Testicular Seminoma
28. Brain Metastases
29. Benign Tumors of the CNS
30. Malignant Tumors of the CNS
31. Hodgkin and Non-Hodgkin Lymphoma
32. Soft Tissue Sarcoma
33. Pediatric Sarcoma
34. Pediatric Brain Tumors
, 4
Chapter 1: Nasopharyngeal Carcinoma
Question 1. During planning for Nasopharyngeal Carcinoma, which action most
directly improves reproducibility of daily treatment delivery for the nasopharynx
and retropharyngeal/nodal pathways?
A. Use the same generic margin and field arrangement applied to unrelated disease
sites for efficiency.
B. Use a disease-site-specific immobilization setup that can be reproduced the
same way at simulation and every treatment fraction.
C. Prioritize beam symmetry or planner convenience even if it increases dose to
nearby critical normal tissue.
D. Define treatment volumes from a single image slice or superficial landmark
rather than full anatomic extent.
✅ Correct Answer: B. Use a disease-site-specific immobilization setup that can be
reproduced the same way at simulation and every treatment fraction.
Rationale: Reproducible immobilization is foundational because high-quality
contouring cannot compensate for inconsistent daily geometry. In nasopharyngeal
carcinoma, the planning objective is to treat the nasopharynx and
retropharyngeal/nodal pathways. The correct option is best because it supports that
objective directly and aligns delineation or setup decisions with anatomy, risk
pattern, and deliverability. The other choices are less appropriate because they
depend on generic shortcuts, incomplete anatomic assessment, or planning
compromises that could either miss relevant disease or increase unnecessary
normal-tissue exposure.
DIF: Moderate
TOP: Nasopharyngeal Carcinoma/simulation and immobilization
MSC: NCLEX Client Needs Category: Physiological Adaptation
, 5
Question 2. A radiation oncology team is preparing CT simulation for
Nasopharyngeal Carcinoma. Which planning choice best supports accurate
delineation of the nasopharynx and retropharyngeal/nodal pathways?
A. Prioritize beam symmetry or planner convenience even if it increases dose to
nearby critical normal tissue.
B. Define treatment volumes from a single image slice or superficial landmark
rather than full anatomic extent.
C. Select planning imaging that clearly distinguishes target from adjacent normal
structures before contouring begins.
D. Reduce target coverage whenever any organ at risk receives attention, even if
disease control would be compromised.
✅ Correct Answer: C. Select planning imaging that clearly distinguishes target
from adjacent normal structures before contouring begins.
Rationale: Clear simulation imaging improves confidence at the very first step: if
boundaries are poorly visualized, every downstream contour and optimization
decision is weakened. In nasopharyngeal carcinoma, the planning objective is to
treat the nasopharynx and retropharyngeal/nodal pathways. The correct option is
best because it supports that objective directly and aligns delineation or setup
decisions with anatomy, risk pattern, and deliverability. The other choices are less
appropriate because they depend on generic shortcuts, incomplete anatomic
assessment, or planning compromises that could either miss relevant disease or
increase unnecessary normal-tissue exposure.
DIF: Hard
TOP: Nasopharyngeal Carcinoma/contrast selection for planning CT
MSC: NCLEX Client Needs Category: Safety and Infection Control
, 6
Question 3. When defining target volumes in Nasopharyngeal Carcinoma, which
statement best reflects sound contouring practice for the nasopharynx and
retropharyngeal/nodal pathways?
A. Define treatment volumes from a single image slice or superficial landmark
rather than full anatomic extent.
B. Reduce target coverage whenever any organ at risk receives attention, even if
disease control would be compromised.
C. Assume anatomy remains unchanged throughout treatment and avoid
reassessment once the plan is approved.
D. Base the gross disease contour on demonstrable tumor extent using all available
clinical and imaging information.
✅ Correct Answer: D. Base the gross disease contour on demonstrable tumor
extent using all available clinical and imaging information.
Rationale: GTV definition should stay tied to demonstrable disease rather than
speculative spread; this keeps subsequent expansions purposeful. In
nasopharyngeal carcinoma, the planning objective is to treat the nasopharynx and
retropharyngeal/nodal pathways. The correct option is best because it supports that
objective directly and aligns delineation or setup decisions with anatomy, risk
pattern, and deliverability. The other choices are less appropriate because they
depend on generic shortcuts, incomplete anatomic assessment, or planning
compromises that could either miss relevant disease or increase unnecessary
normal-tissue exposure.
DIF: Easy
TOP: Nasopharyngeal Carcinoma/gross tumor volume definition
MSC: NCLEX Client Needs Category: Safe and Effective Care Environment
, 7
Question 4. A resident is expanding the high-risk target in Nasopharyngeal
Carcinoma. Which principle is most appropriate when converting visible disease
into a clinically meaningful treatment volume for the nasopharynx and
retropharyngeal/nodal pathways?
A. Expand from visible disease according to expected microscopic spread rather
than by applying an arbitrary uniform margin alone.
B. Reduce target coverage whenever any organ at risk receives attention, even if
disease control would be compromised.
C. Assume anatomy remains unchanged throughout treatment and avoid
reassessment once the plan is approved.
D. Exclude clinically relevant pathways of spread unless gross disease is already
visible in that exact location.
✅ Correct Answer: A. Expand from visible disease according to expected
microscopic spread rather than by applying an arbitrary uniform margin alone.
Rationale: CTV design exists to capture likely microscopic extension, so it should
reflect biology and local patterns of spread rather than a purely mechanical buffer.
In nasopharyngeal carcinoma, the planning objective is to treat the nasopharynx
and retropharyngeal/nodal pathways. The correct option is best because it supports
that objective directly and aligns delineation or setup decisions with anatomy, risk
pattern, and deliverability. The other choices are less appropriate because they
depend on generic shortcuts, incomplete anatomic assessment, or planning
compromises that could either miss relevant disease or increase unnecessary
normal-tissue exposure.
DIF: Moderate
TOP: Nasopharyngeal Carcinoma/clinical target volume expansion
MSC: NCLEX Client Needs Category: Physiological Integrity
, 8
Question 5. For a patient with Nasopharyngeal Carcinoma, what is the best reason
to individualize the planning target volume margin around the nasopharynx and
retropharyngeal/nodal pathways?
A. Assume anatomy remains unchanged throughout treatment and avoid
reassessment once the plan is approved.
B. Match the margin to expected setup and internal uncertainties instead of using
the same expansion for every patient.
C. Exclude clinically relevant pathways of spread unless gross disease is already
visible in that exact location.
D. Escalate dose uniformly to all surrounding tissues to simplify optimization.
✅ Correct Answer: B. Match the margin to expected setup and internal
uncertainties instead of using the same expansion for every patient.
Rationale: PTV margins are meant to absorb real-world uncertainty; patient-
specific variation in setup and internal motion matters more than convenience. In
nasopharyngeal carcinoma, the planning objective is to treat the nasopharynx and
retropharyngeal/nodal pathways. The correct option is best because it supports that
objective directly and aligns delineation or setup decisions with anatomy, risk
pattern, and deliverability. The other choices are less appropriate because they
depend on generic shortcuts, incomplete anatomic assessment, or planning
compromises that could either miss relevant disease or increase unnecessary
normal-tissue exposure.
DIF: Hard
TOP: Nasopharyngeal Carcinoma/planning target volume margin design
MSC: NCLEX Client Needs Category: Reduction of Risk Potential
Question 6. In elective treatment design for Nasopharyngeal Carcinoma, which
approach is most appropriate for the nasopharynx and retropharyngeal/nodal
, 2
Target Volume Delineation and Field
Setup: A Practical Guide for
Conformal and Intensity-Modulated
Radiation Therapy (Practical Guides
in Radiation Oncology) –Test Bank
Second Edition (2022)
Chapters
1. Nasopharyngeal Carcinoma
2. Oropharyngeal Carcinoma
3. Stereotactic Body Radiotherapy for Cancers of the Head and Neck Cancer
4. Larynx Cancer
5. Hypopharyngeal Carcinoma
6. Oral Cavity Cancers
7. Nasal Cavity and Paranasal Sinus Tumors
8. Major Salivary Glands
9. Thyroid Cancer
10. Squamous Cell Carcinoma of Unknown Primary in the Head and Neck
11. Early Breast Cancer
12. Regional Lymph Node Irradiation for Breast Cancer
13. Lung Cancer
14. Esophageal Cancer
15. Gastric Cancer
16. Pancreatic Cancer
17. Hepatocellular Carcinoma
18. Rectal Cancer
, 3
19. Anal Cancer
20. Postoperative Therapy for Cervical, Vaginal, and Endometrial Cancer
21. Definitive Therapy for Cervical, Vaginal, and Endometrial Cancer
22. Image-Guided Brachytherapy
23. Vulvar Cancer
24. Advanced Technologies and Treatment Techniques for Gynecologic
Malignancies
25. Prostate Adenocarcinoma
26. Bladder Cancer
27. Testicular Seminoma
28. Brain Metastases
29. Benign Tumors of the CNS
30. Malignant Tumors of the CNS
31. Hodgkin and Non-Hodgkin Lymphoma
32. Soft Tissue Sarcoma
33. Pediatric Sarcoma
34. Pediatric Brain Tumors
, 4
Chapter 1: Nasopharyngeal Carcinoma
Question 1. During planning for Nasopharyngeal Carcinoma, which action most
directly improves reproducibility of daily treatment delivery for the nasopharynx
and retropharyngeal/nodal pathways?
A. Use the same generic margin and field arrangement applied to unrelated disease
sites for efficiency.
B. Use a disease-site-specific immobilization setup that can be reproduced the
same way at simulation and every treatment fraction.
C. Prioritize beam symmetry or planner convenience even if it increases dose to
nearby critical normal tissue.
D. Define treatment volumes from a single image slice or superficial landmark
rather than full anatomic extent.
✅ Correct Answer: B. Use a disease-site-specific immobilization setup that can be
reproduced the same way at simulation and every treatment fraction.
Rationale: Reproducible immobilization is foundational because high-quality
contouring cannot compensate for inconsistent daily geometry. In nasopharyngeal
carcinoma, the planning objective is to treat the nasopharynx and
retropharyngeal/nodal pathways. The correct option is best because it supports that
objective directly and aligns delineation or setup decisions with anatomy, risk
pattern, and deliverability. The other choices are less appropriate because they
depend on generic shortcuts, incomplete anatomic assessment, or planning
compromises that could either miss relevant disease or increase unnecessary
normal-tissue exposure.
DIF: Moderate
TOP: Nasopharyngeal Carcinoma/simulation and immobilization
MSC: NCLEX Client Needs Category: Physiological Adaptation
, 5
Question 2. A radiation oncology team is preparing CT simulation for
Nasopharyngeal Carcinoma. Which planning choice best supports accurate
delineation of the nasopharynx and retropharyngeal/nodal pathways?
A. Prioritize beam symmetry or planner convenience even if it increases dose to
nearby critical normal tissue.
B. Define treatment volumes from a single image slice or superficial landmark
rather than full anatomic extent.
C. Select planning imaging that clearly distinguishes target from adjacent normal
structures before contouring begins.
D. Reduce target coverage whenever any organ at risk receives attention, even if
disease control would be compromised.
✅ Correct Answer: C. Select planning imaging that clearly distinguishes target
from adjacent normal structures before contouring begins.
Rationale: Clear simulation imaging improves confidence at the very first step: if
boundaries are poorly visualized, every downstream contour and optimization
decision is weakened. In nasopharyngeal carcinoma, the planning objective is to
treat the nasopharynx and retropharyngeal/nodal pathways. The correct option is
best because it supports that objective directly and aligns delineation or setup
decisions with anatomy, risk pattern, and deliverability. The other choices are less
appropriate because they depend on generic shortcuts, incomplete anatomic
assessment, or planning compromises that could either miss relevant disease or
increase unnecessary normal-tissue exposure.
DIF: Hard
TOP: Nasopharyngeal Carcinoma/contrast selection for planning CT
MSC: NCLEX Client Needs Category: Safety and Infection Control
, 6
Question 3. When defining target volumes in Nasopharyngeal Carcinoma, which
statement best reflects sound contouring practice for the nasopharynx and
retropharyngeal/nodal pathways?
A. Define treatment volumes from a single image slice or superficial landmark
rather than full anatomic extent.
B. Reduce target coverage whenever any organ at risk receives attention, even if
disease control would be compromised.
C. Assume anatomy remains unchanged throughout treatment and avoid
reassessment once the plan is approved.
D. Base the gross disease contour on demonstrable tumor extent using all available
clinical and imaging information.
✅ Correct Answer: D. Base the gross disease contour on demonstrable tumor
extent using all available clinical and imaging information.
Rationale: GTV definition should stay tied to demonstrable disease rather than
speculative spread; this keeps subsequent expansions purposeful. In
nasopharyngeal carcinoma, the planning objective is to treat the nasopharynx and
retropharyngeal/nodal pathways. The correct option is best because it supports that
objective directly and aligns delineation or setup decisions with anatomy, risk
pattern, and deliverability. The other choices are less appropriate because they
depend on generic shortcuts, incomplete anatomic assessment, or planning
compromises that could either miss relevant disease or increase unnecessary
normal-tissue exposure.
DIF: Easy
TOP: Nasopharyngeal Carcinoma/gross tumor volume definition
MSC: NCLEX Client Needs Category: Safe and Effective Care Environment
, 7
Question 4. A resident is expanding the high-risk target in Nasopharyngeal
Carcinoma. Which principle is most appropriate when converting visible disease
into a clinically meaningful treatment volume for the nasopharynx and
retropharyngeal/nodal pathways?
A. Expand from visible disease according to expected microscopic spread rather
than by applying an arbitrary uniform margin alone.
B. Reduce target coverage whenever any organ at risk receives attention, even if
disease control would be compromised.
C. Assume anatomy remains unchanged throughout treatment and avoid
reassessment once the plan is approved.
D. Exclude clinically relevant pathways of spread unless gross disease is already
visible in that exact location.
✅ Correct Answer: A. Expand from visible disease according to expected
microscopic spread rather than by applying an arbitrary uniform margin alone.
Rationale: CTV design exists to capture likely microscopic extension, so it should
reflect biology and local patterns of spread rather than a purely mechanical buffer.
In nasopharyngeal carcinoma, the planning objective is to treat the nasopharynx
and retropharyngeal/nodal pathways. The correct option is best because it supports
that objective directly and aligns delineation or setup decisions with anatomy, risk
pattern, and deliverability. The other choices are less appropriate because they
depend on generic shortcuts, incomplete anatomic assessment, or planning
compromises that could either miss relevant disease or increase unnecessary
normal-tissue exposure.
DIF: Moderate
TOP: Nasopharyngeal Carcinoma/clinical target volume expansion
MSC: NCLEX Client Needs Category: Physiological Integrity
, 8
Question 5. For a patient with Nasopharyngeal Carcinoma, what is the best reason
to individualize the planning target volume margin around the nasopharynx and
retropharyngeal/nodal pathways?
A. Assume anatomy remains unchanged throughout treatment and avoid
reassessment once the plan is approved.
B. Match the margin to expected setup and internal uncertainties instead of using
the same expansion for every patient.
C. Exclude clinically relevant pathways of spread unless gross disease is already
visible in that exact location.
D. Escalate dose uniformly to all surrounding tissues to simplify optimization.
✅ Correct Answer: B. Match the margin to expected setup and internal
uncertainties instead of using the same expansion for every patient.
Rationale: PTV margins are meant to absorb real-world uncertainty; patient-
specific variation in setup and internal motion matters more than convenience. In
nasopharyngeal carcinoma, the planning objective is to treat the nasopharynx and
retropharyngeal/nodal pathways. The correct option is best because it supports that
objective directly and aligns delineation or setup decisions with anatomy, risk
pattern, and deliverability. The other choices are less appropriate because they
depend on generic shortcuts, incomplete anatomic assessment, or planning
compromises that could either miss relevant disease or increase unnecessary
normal-tissue exposure.
DIF: Hard
TOP: Nasopharyngeal Carcinoma/planning target volume margin design
MSC: NCLEX Client Needs Category: Reduction of Risk Potential
Question 6. In elective treatment design for Nasopharyngeal Carcinoma, which
approach is most appropriate for the nasopharynx and retropharyngeal/nodal
