FINAL EXAM NATIONAL BOARD OF EXAMINATIONS
DECEMBER 2017

POSSESSION/USE OF CELL PHONES OR ANY SUCH ELECTRONIC GADGETS IS NOT PERMITTED INSIDE THE EXAMINATION HALL.
RADIOTHERAPY
PAPER I
RTH/D/17/41/I
Time 3 hours
Max. Marks 100
Important instructions:
• Attempt all questions in order.
• Each question carries 10 marks.
• Read the question carefully and answer to the point neatly and legibly.
• Do not leave any blank pages between two answers.
• Indicate the question number correctly for the answer in the margin space.
• Answer all the parts of a single question together.
• Start the answer to a question on a fresh page or leave adequate space between two answers.
• Draw table/diagrams/flowcharts wherever appropriate.
Write short notes on:
1. What is cell survival curve?
Discuss the various components of the curve.
How would its shape differ for neutrons versus X-rays?

2. What are the radio-isotopes commonly used in
teletherapy? Give reasoning.
What are the radio-isotopes commonly used in
brachytherapy. Give reasoning.
What are the current recommendations of image
guided brachytherapy?
Enumerate the advantages disadvantages of
interstitial versus intracavitary irradiation in carcinoma
cervix.

3. Describe using a schematic diagram the various levels
of lymph nodes of neck.
Write the AJCC staging of oral cavity cancer.
Write WHO classification of lung tumours.

4. Discuss the various phases of a clinical trial.
What sample size is important in a clinical trial?
What are univariate and multivariate analysis?
What are the various types of DVH? What are the
advantages of DVH?

5. Draw the isodose curves for (representative of a typical
beam):
Photon beam
Electron beam
Proton beam
250 KV beam
Carbon ion
2x5
P.T.O
FINAL EXAM NATIONAL BOARD OF EXAMINATIONS
DECEMBER 2017

POSSESSION/USE OF CELL PHONES OR ANY SUCH ELECTRONIC GADGETS IS NOT PERMITTED INSIDE THE EXAMINATION HALL.
6. Describe lymphatic drainage of
Breast
Cervix
Anterior two thirds tongue

7. Mention half life energy of following isotopes:
Cobalt 60
Iridium 192
Caesium 137
Radium 226
Tantalum 182
2x5
8. Sensitivity
Specificity
Odds ratio

9. Define discuss factors affecting:
Photo electric effect
Compton effect
Pair production

10. Histological classification of
Hodgkin's lymphoma
Non Hodgkin's lymphoma
5+5