Seat No.: Enrolment No.
GUJARAT TECHNOLOGICAL UNIVERSITY
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BE- SEMESTER-VII (NEW) EXAMINATION - WINTER 2020
Subject Code:2170303 Date:19/01/2021
Subject Name:Medical Imaging techniques
Time:10:30 AM TO 12:30 PM Total Marks: 56
Instructions:
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- Attempt any FOUR questions out of EIGHT questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
MARKS
Q.1 (a) Explain aperture diaphragm type beam restrictor. Calculate 03 penumbra width when focal spot is 2cm wide, distance between source and object is 10cm, and distance between object and detector is 2m.
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(b) Describe Line Focus Principle and Heel Effect and brief. 04
(c) With Neat diagram, discuss ‘Xeroradiography’. 07
Q.2 (a) Explain Coherent and Compton scattering. 03
(b) Compare 3 and 4™ generation of CT scan machine. 04
(c) What is CT number? Explain its importance in CT image 07 reconstruction.
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Q.3 (a) Explain longitudinal acoustic propagation. 03
(b) What is matching in ultrasonic transducers? Explain mechanical 04 matching.
(c) Explain A-mode imaging. 07
Q.4 (a) Explain reflection and refraction in ultrasound transmission. 03
(b) Discuss Beam profile of single element ultrasonic transducers. 04
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(c) Explain B-mode imaging: 07
Q.5 (a) Enlist different Array structures in ultrasonic transducers. What 03 are the advantages of array structure?
(b) Draw the block diagram of magnetic resonance system and enlist 04 its components.
(c) Explain slice selection method in magnetic resonance system. 07
Q.6 (a) Explain cavitation as biological effect of ultrasound. 03
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(b) What is primary magnetic field? Explain its effect on hydrogen 04 atoms in human body in detail.
(c) Discuss in detail image reconstruction methods used in NMR 07 imaging.
Q.7 (a) Explain fundamentals of medical thermography. 03
(b) Discuss interaction of nuclear particles and matter. 04
(c) Discuss SPECT in detail. 07
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Q.8 (a) Enlist nuclear radiation detectors. Draw schematic diagram of 03 scintillation detector.
(b) Discuss thermographic equipment in detail. 04
(c) Explain PET scanner in detail. 07
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