GTU BE/B.Tech 2017 Winter Question Papers || Gujarat Technological University
Subject Code: 2170303
GUJARAT TECHNOLOGICAL UNIVERSITY
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BE - SEMESTER-VII (NEW) EXAMINATION — WINTER 2017Subject Name: Medical Imaging techniques
Date: 02/11/2017
Time: 10:30 AM TO 01:00 PM
Total Marks: 70
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Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
| Q.1 | (a) Describe the characteristics of X-rays. | 03 |
| (b) Explain the effect of pair production and photodisintegration. | 04 | |
| (c) Draw and explain the constructional details of rotating anode X-ray tube. | 07 | |
| Q.2 | (a) Define edge spread function. | 03 |
| (b) Explain compton scattering with necessary diagram. | 04 | |
| (c) Write a descriptive note on X-ray image intensifiers. --- Content provided by FirstRanker.com --- ORWrite a descriptive note on beam restrictors and grids. | 07 | |
| Q.3 | (a) Define Attenuation, Absorption and Scattering for ultrasound. | 03 |
| (b) Draw diagram for showing attenuation of ultrasound in various biological materials. | 04 | |
| (c) Explain the back projection and filtered back project algorithms. OR Define the doppler effect with necessary diagram. | 07 | |
| Q.4 | (a) List and explain the types of radioactive decay that produce radiation. | 03 |
| (b) Enlist and explain different generations of CT scanner. | 04 | |
| (c) Draw and explain the spectral distribution of infrared emission from human skin. | 07 | |
| Q.5 | (a) Draw the block diagram of a basic pulse-echo system. | 03 |
| (b) Describe the principle of time-motion (M-mode) display. | 04 | |
| (c) Draw the spectral characteristics of various types of infrared detectors. OR --- Content provided by FirstRanker.com --- Draw the multilayer matching between transducer's piezoelectric element and body tissue. | 07 | |
| Q.6 | (a) Describe the instrumentation of 2-D echo cardiography. | 03 |
| (b) Outline the fundamental principle of positron emission tomography. | 04 | |
| (c) Briefly describe the scintillation detector. | 07 | |
| Q.7 | (a) Explain the advantages and biological effect of NMR imaging system. | 03 |
| (b) State the Bloch equation for NMR imaging system. | 04 | |
| (c) Draw the block diagram of gamma camera. OR Briefly explain the image reconstruction techniques for MRI with necessary diagrams. | 07 |
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