[LO 0219] FEBRUARY 2019 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. Explain the different types of brachytherapy procedures.
2. Explain the methods to correct contour irregularities.
3. Draw a diagram of linear accelerator and explain in detail about Linac head
and its constituents.
II. Write notes on: x 5 40)
1. Exposure rate constant.
2. Dynamic wedges.
3. Treatment planning system.
4. What are heavy particles/mention its use in radiotherapy?
5. Isodose curve.
6. Explain percentage depth dose.
7. SSD, SAD technique.
8. Quality assurance in Cobalt 60.
III. Short answers on: (10 x 3 30)
1. Scatter air ratio.
2. Mould.
3. Bolus and its uses.
4. Collimator scatter factor.
5. Skin sparing factor.
6. Isocentre.
7. BETATRON.
8. Define off axis ratio.
9. Explain autoradiography.
10. Write the different shelter mechanism to move source to on and off in
telecobalt unit.