FEBRUARY 2018 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. Patient immobilization devices.
2. Physical components of a remote afterloading brachytherapy unit.
3. A detailed account of wedges used in radiotherapy.
II. Write notes on: x 5 40)
1. Linear accelerator.
2. Physical and biological half-life.
3. Simulator.
4. Compensators.
5. Compare the SSD technique with SAD technique.
6. Intensity Modulated Radiotherapy.
7. List the different types of shutter systems used in telecobalt machines.
8. Tomotherapy.
III. Short answers on: (10 x 3 30)
1. Role of a phantom in dosimetry.
2. Shielding blocks.
3. Secondary electrons.
4. IGRT.
5. What is the difference between SRS and SRT?
6. What is a beam directional device? Give an example.
7. Bragg curve.
8. Three advantages of linear accelerator over telecobalt treatment unit.
9. Gamma knife.
10. Port film.