Dr. MGR University AUGUST 2015 Question Paper
Subject : PAPER III – RADIOTHERAPY PHYSICS AND PRINCIPLES OF RADIOTHERAPY
[LH 0815] Sub. Code: 1908B.Sc. RADIOTHERAPHY TECHNOLOGY
(New Syllabus 2014-2015)
FIRST YEAR
PAPER III – RADIOTHERAPY PHYSICS AND PRINCIPLES OF RADIOTHERAPY
Q.P. Code: 801908
Time : Three Hours Maximum : 100 marks
Answer ALL questions
I. Elaborate on: (3 x 10 = 30)
1. Explain the interaction of electron with matter.
2. With the help of neat sketch explain the construction and working of
Co-60 tele therapy unit.
3. Give a detailed account of wedges used in radiotherapy.
II. Write notes on: (8 x 5 = 40)
1. Compton effect.
2. Iso dose curves.
3. Linear accelerator.
4. Simulators used in radiotherapy planning.
5. Factors that depends of percentage depth dose.
6. Immobilization devises in radiotherapy.
7. SRT and SRS.
8. Bolus and phantom materials.
III. Short Answers on: (10 x 3 = 30)
1. Physical and biological half life.
2. LET.
3. Tissue compensators.
4. Bragg curve.
5. Particle range.
6. Tissue maximum dose.
7. Tissue Air Ratio.
8. Port film.
9. Physical characteristics of Co-60 radioactive isotope.
10. SSD and SAD techniques.
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