[LO 0219] FEBRUARY 2019 Sub. Code: 1908
B.Sc. RADIOTHERAPY TECHNOLOGY
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: x 10 30)
1. Explain the main modes of interaction of photon with matter.
2. Explain the construction and working principle of Linear Accelerator.
3. Give a detailed discussion on Intensity Modulated Radiotherapy.
II. Write notes on: x 5 40)
1. Tissue Equivalent Materials.
2. Isodose curves.
3. Energy transfer and Energy Absorption Coefficients.
4. Radiotherapy simulator.
5. Factors that influence percentage depth dose.
6. Immobilization devises in radiotherapy.
7. Stereotactic Radiotherapy.
8. Tissue Sparing Effect.
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 technique.