FEBRUARY 2018 Sub. Code: 1823
B.Sc. RADIOLOGY IMAGING TECHNOLOGY
THIRD YEAR
PAPER III RADIOBIOLOGY AND RADIATION SAFETY
Q.P. Code: 801823
Time: Three Hours Maximum: 100 Marks
Answer all questions
I. Elaborate on: x 10 30)
1. Describe the Direct and Indirect action of radiation on biological molecules.
2. Draw a CT layout and discuss the safety specifications in details as per AERB
Recommendations.
3. Discuss the safe work practices in diagnostic radiology department to reduce
patient exposure.
II. Write notes on: x 5 40)
1. Explain briefly about medical exposure of patients with ionizing radiation.
2. Discuss the radiolysis of water.
3. Compare the risk of radiation with other industries.
4. Discuss the calculations for Primary and secondary barrier designs.
5. Discuss the radiation survey procedure in X ray installations.
6. Write the does limits recommended by the ICRP 2007 Recommendations.
7. Principle of Thermoluminescent Dosimeter and Guidelines for using TLDs.
8. Write the specifications for protective devices used in diagnostic radiology
department.
III. Short answers on: (10 x 3 30)
1. Radiation Hormesis.
2. Lifespan shortening.
3. Use factor and occupancy factor.
4. Area monitors.
5. What is chronic radiation dermatitis?
6. Law of Bergonie and tribondeau.
7. Define relative risk? List out the relative risks of radiation induced malignancies.
8. Relative biological effectiveness and radio sensitivity.
9. Radiation effects on eye and current dose limit.
10. What is meant by ALARA? Explain its significance.