Treatment Planning in Radiotherapy – MCQs with Answers (Volume One) – Comprehensive Practice Question Set for Radiotherapy Students and Clinicians

TREATMENT PLANNING IN
RADIOTHERAPY — 50 MCQs WITH
ANSWERS
VOLUME ONE

, MCQs 1–10: Target Volumes & Imaging
1. The GTV represents:
A. Microscopic tumour spread
B. Visible tumour only
C. Irradiated tissue
D. Treatment margin
Answer: B

2. The CTV includes:
A. Only gross tumour
B. Setup error
C. Microscopic disease extension
D. Normal structures
Answer: C

3. The PTV margin compensates for:
A. Tumour biology
B. Setup errors and patient motion
C. Dose uncertainties only
D. Organ tolerance
Answer: B

4. The best imaging modality for soft-tissue definition is:
A. CT
B. MRI
C. CBCT
D. PET
Answer: B

5. PET-CT is most useful for:
A. Dose calculation accuracy
B. Soft tissue contrast
C. Metabolic tumour activity
D. Motion tracking
Answer: C

6. CT slice thickness for planning should ideally be:
A. 10 mm
B. 1–3 mm
C. 5–10 mm
D. 0.1 mm
Answer: B

7. ITV is primarily used for:
A. CNS tumours
B. Prostate cases
C. Mobile organs (lung/liver)