University : Indira Gandhi National Open University
Degree : B.Sc
Year : II
Subject : BAHI031 Basics Of Radiological Physics
Document Type : Question Paper
Website : ignou.ac.in
Download Model/Sample Question Paper : https://www.pdfquestion.in/uploads/5662-BAHI-031.pdf
Basics Of Radiological Physics Question :
B.Sc. IN MEDICAL IMAGING a TECHNOLOGY June, 2011
Time : 3 hours
Maximum Marks : 70
Related : Indira Gandhi National Open University BAHI021 Medical Record Science B.Sc Question Paper : www.pdfquestion.in/5661.html
PART – A
Answer any five questions. 8×5=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
BAHI-031 : Basics Of Radiological Physics December, 2015 :
1. What is Rectifier ? Describe the full wave rectifier used in X-ray machine.
2. Describe the stationary anode X-ray tube with neat diagram.
3. What is Radioactivity ? Derive the equation N= Noe .
4. Describe the Biological effects of radiation.
5. Describe :
(a) Photoelectric effect.
(b) Compton effect.
6. Describe the various protective devices used in the Radiology Department.
7. Describe the free air ion chamber. How it is used to measure the exposure rate of gamma rays ?
8. Describe the personnel monitoring devices used in Radiology Department.
Part – B :
9. Write short notes on any five of following. Each carries six marks : 5×6=30
(a) Half life.
(b) Auto transformer.
(c) Anode heel effect.
(d) Kirchoff s Law.
(e) Maximum permissible dose limits.
(f) Filtration in the X-ray tube.
(g) 13 — Decay.
(h) Properties of X-rays
BAHI-031 : Basics Of Radiological Physics June, 2015
Time : 3 hours
Maximum Marks : 70
Part – A :
1. Fill in the blanks : 1×10=10
(a) In dry view camera films are processed by
(b) Duplicating films are used for
(c) IOPA films are used for Radiography.
(d) gives off focal radiation.
(e) Focusing cup of X-ray tube is made of
(f) In developer PQ stands for
(g) Selenium is used in detectors.
(h) Walls of dark room should be painted in color.
(i) In CR , PSP stands for
(j) In radiology department thin film transistors are commonly used in
2. Write short-notes on the following : 2×5=10
(a) Materials used in rare-earthscreens.
(b) Hardener in fixer solution
(c) Phenedone
(d) Speed of film.
(e) AgBr.
Part – B :
Attempt any four questions. 5×4=20
3. Describe the maintenance protocols of automatic processors.
4. Describe construction and care of the CR cassette.
5. Explain basic structure of Indirect type DR Detector.
6. Describe the construction of X- Ray film.
7. Describe the role and function of gelatin in x-ray film.
Part – C :
Attempt any three questions. 10×3=30
8. Describe in detail the construction and functioning of automatic processor.
9. Discuss in detail about the image acquisition and read out mechanism of CR system.
10. Explain in detail the advantages and the disadvantages of DR system.
11. Enumerate with relevant details the various types of Intensifying screens used in Radiology department.