NTRUHS MD-MS Question Papers Last 10 Years 2010-2020 (Dr. NTR University of Health Sciences)
M.D. DEGREE EXAMINATION — APRIL, 2013
RADIOTHERAPY
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PAPER-I : BASIC SCIENCES
Time: 3 Hours Max. Marks:100
Note: Answer all questions. All questions carry equal marks.
WRITE SHORT ESSAYS ON THE FOLLOWING:
- Discuss the steps involved in IMRT treatment of a nasopharyngeal carcinoma.
- Define wedges. Discuss the use of wedges in the treatment of head and neck malignancies with radiotherapy.
- What is percentage depth dose and what are the factors influencing it?
- Define linear energy transfer. Discuss the variation of this entity in the different modalities of particulate radiation.
- Describe briefly the various beam modifying devices.
- Define hyperfractionation and discuss the radiobiological rationale.
- Enumerate the deterministic effects of radiation. Add a note on radiation cataractogenesis.
- Discuss the effects of radiation on the embryo at various developmental ages.
- Enumerate the dose limits as per the NCRP guidelines. Add a note on the concept of ALARA.
- Discuss the late effects of radiation on the lung. Add a note on its management.
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