BSc Medical Imaging Technology Indira Gandhi National Open University Model Question Paper : www.webserver.ignou.ac.in

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Indira Gandhi National Open University
B.Sc. IN MEDICAL IMAGING TECHNOLOGY
Term-End Examination
June, 2011
BAHI-031 : BASICS OF RADIOLOGICAL PHYSICS
Time : 3 hours Maximum Marks : 70

Model Question List : http://webserver.ignou.ac.in/prevyrp...cpms.htm#cpms1
Model Question Paper : http://webserver.ignou.ac.in/prevyrp...T/BAHI-031.pdf

PART - A
Answer any five questions. 8x5=40
1. What is the principle of a transformer ? Explain the construction and working of a step - down transformer.

2. Write about the construction and operation of an x-ray tube with the help of suitable diagram.

3. (a) Define Radioactivity.
(b) Describe the properties of Alpha, Beta and gamma rays.

4. (a) Define Dose equivalent and mention its units.
(b) Describe the recent ICRP recommended dose limits for radiation worker and general public.
(c) Explain in brief about the characteristics of shielding material for radiological protection.

5. (a) Explain the necessity of radiation survey during x-ray installation.
(b) Enlist the personnel monitoring devices and briefly describe any one device.

6. (a) Enlist the internal and external hazards of a radioactive material.
(b) Explain how we can control the radiation hazards from the radioactive sources.

7. Explain the different methods by which the radiation interacts with the matter.

8. (a) Explain the essential characteristics of a radiation dosimeter.
(b) Describe in brief the principles of radiation measurement.

PART ; B
9. Write short note on any five of the following :
(a) Handling of radioactive sources.
(b) Filters in x-ray machine.
(c) Exponential law.
(d) Newtons law of cooling.
(e) Characteristic radiation
(f) Electromagnetic spectrum
(g) Thermionic emission
(h) Cathode of x - ray tube 6x5=30