AUGUST 2018 Sub. Code: 1838
B.Sc. RADIOLOGY IMAGING TECHNOLOGY
(New syllabus 2014-2015)
THIRD YEAR
PAPER III QUALITY CONTROL, RADIOBIOLOGY AND RADIATION
SAFETY IN RADIODIAGNOSIS IMAGING
Q.P. Code: 801838
Time: Three Hours Maximum: 100 Marks
Answer all questions
I. Elaborate on: x 10 30)
1. Draw a neat diagram of a diagnostic X-ray room of 4 x 4.5 sqm with all safety
measures. The number of patients per week is 600, the exposure parameters are
80k V and 20mAs for 2 films per patient. Calculate the workload and shielding for
primary and secondary barrier assuming the room is located in a hospital setup.
The weekly permissible scatter radiation dose at 1m is 0.1.
2. Describe in details the various steps to obtain registration of an X-ray machine
with AERB.
3. Describe at least five main quality assurance procedures required for a CT scanner.
II. Write notes on: x 5 40)
1. Collimator alignment test.
2. Ionisation chamber.
3. Deterministic effect.
4. Test for X-ray output reproducibility.
5. Good work practices in CT.
6. Area surveillance in a CT scanner room with neat diagram of a CT room.
7. How to monitor radiation dose to patient in fluoroscopy and CT?
8. GM counter.
III. Short answers on: (10 x 3 30)
1. KERMA
2. Survey meter.
3. MPD.
4. Inverse square law.
5. HVL.
6. Total filtration.
7. Contamination monitor.
8. TLD.
9. Equivalent dose.
10. Radioactivity.