FEBRUARY 2018 Sub. Code: 1932
B.Sc. RADIOTHERAPY TECHNOLOGY
SECOND YEAR
PAPER II RADIOTHERAPY EQUIPMENTS, APPLICATIONS
MAINTENANCE
Q.P. Code: 801932
Time: Three Hours Maximum: 100 Marks
Answer all questions
I. Elaborate on: x 10 30)
1. Write in detail about front and back pointers with a suitable diagram.
2. What is a CT Simulator? Explain the process of CT simulation.
3. Explain the different types of brachytherapy procedures.
II. Write notes on: x 5 40)
1. Explain autoradiography.
2. Tissue compensators.
3. Treatment planning system.
4. Distinguish between Magnetron and Klystron.
5. Write about the physical characteristics of C-60 brachytherapy source.
6. Explain tissue phantom ratio.
7. Write about multileaf collimators.
8. Characteristics of a clinical electron beam.
III. Short answers on: (10 x 3 30)
1. Dynamic wedges.
2. Isodose curves.
3. Exposure rate constant.
4. Mention few dosimetry systems in brachytherapy.
5. Contact therapy.
6. Off-Axis ratio.
7. Calculate the equivalent square field for 15 x 5 cm2.
8. What are heavy particles? Mention two of them used in radiotherpy.
9. Clinical Target Volume (CTV).
10. Permanent implants.