BME603 Biomedical Imaging-II B.Tech Question Paper : wbut.ac.in
Name of the University : West Bengal University of Technology
Department : Biomedical Engineering
Degree : B.Tech
Sem : VI
Subject Code/Name : BME-603/Biomedical Imaging-II
Website : wbut.ac.in
Document Type : Previous Year Examination Question Paper
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Biomedical Imaging-II Question Paper :
Engineering & Management Examinations, June – 2009 :
Semester – 6
Time : 3 Hours
Full Marks : 70
** The figures in the margin indicate full marks.
** Candidates are required to give their answers in their own words as far as practicable.
Related / Similar Question Paper : WBUT B.Tech Economics For Engineers Question Paper
GROUP – A : ( Multiple Choice Type Questions )
1. Choose the correct alternatives for the following : 10 × 1 = 10
i) The image resolution is measured in
a) LP mm – 1 b) LP m – 1
c) LP in – 1 d) LP ft – 1 .
ii) Computed tomography measures the
a) transmitted intensity of X-ray
b) attenuation coefficient of X-ray
c) incident intensity of X-ray
d) detector’s efficiency.
iii) Ring artefacts in CT image occurs due to
a) beam hardening b) detector’s non-uniformity
c) higher slice thickness d) noise.
iv) The windowing system of CT, dispyayed the images using
a) 6-bit gray scale b) 8-bit gray scale
c) 10-bit gray scale d) 12-bit gray scale.
v) The radioisotope used in nuclear medicine is
a) 124 Xe b) 130 Te
c) 99 Tc d) 235 U.
vi) Pixel is
a) 1D image b) 2D imge
c) 3D image d) none of these.
vii) Precession or wobbling of MRI is a
a) first order motion b) second order motion
c) third order motion d) none of these.
viii) T2 relaxation of MRI is also called as
a) spin-spin relaxation b) spin-lattice relaxation
c) both of (a) and (b) d) none of these.
ix) Streak artefacts occur in
a) CT images b) Isotope imaging
c) MRI d) Ultrasound imaging.
x) Which of the isotope imaging scanners is not used any more i.e. obsolete ?
a) PET scanner b) Gamera camera
c) Rectilinear scanner d) SPECT.
GROUP – B : ( Short Answer Type Questions )
Answer any three of the following questions. 3 × 5 = 15
2. Define ‘Doppler Effect’. Draw a neat sketch and write an equation for the Doppler Frequency of blood flowing through a vessel. 2 + 3
3. What is Isotope Imaging ? Explain with a block diagram a Radioisotope Generator. 1 + 4
4. In CT what data are we measuring ? Draw and explain Houndsfield scale. 1 + 4
5. Compare the advantages and disadvantages of Ultrasound, CT and MRI. 5
6. What is the importance of time-gain circuit of medical ultrasound ? Describe the construction of ultrasound probe with a neat sketch. 2 + 3
7. Describe the basic principles of ultrasound imaging. What is therapeutic and diagnostic ultrasound ? 3 + 2
GROUP – C : ( Long Answer Type Questions )
Answer any three of the following questions. 3 × 15 = 45
8. What is a Cyclotron ? Briefly explain its operation. Draw a diagram of Positron Emission Tomography ( PET ) used in Isotope imaging and explain the principle of imaging. 2 + 4 + 4 + 5
9. What is ultrasound ? Write an equation for the velocity of ultrasound wave. Draw a neat sketch of an ultrasound transducer ( probe ) and explain the function of all the components. 2 + 3 + 5 + 5
10. What is windowing system of CT image display ? Explain the CT image reconstruction technique in detail. 7 + 8
11. Explain different scanner systems of ultrasound imaging. Describe different modes of operation and their application. 7 + 8
12. Describe the basic principles of CT scan. Briefly explain the image quality and probable causes of CT imge artefacts. 8 + 7
13. Write short notes on any two of the following : 2 × 7
a) T1 and T2 relaxations of MRI
b) SPECT
c) Superconductive electromagnet of MRI
d) Generation of Computed Tomography ( CT ).
Biomedical Imaging-II – 2012 :
Time Allotted : 3 Hours
Full Marks : 70
** The figures in the margin indicate full marks.
** Candidates are required to give their answers in their own words as far as practicable.
GROUP – A : ( Multiple Choice Type Questions )
1. Choose the correct answers of the following : 10 × 1 = 10
i) The piezoelectric crystal used in commercially manufactured ultrasound units is
a) Caesium Iodide (CsI)
b) Natural quartz
c) Sodium Iodide (NaI)
d) Lead Zirconate Titanate.
ii) The value of Pulse Repetition Frequency (PRF) for diagnostic ultrasound is typically
a) 100 Hz b) 1 kHz
c) 10 kHz d) 1 MHz.
iii) The windowing system of CT, displayed the images using
a) 6-bit gray scale b) 8-bit gray scale
c) 10-bit gray scale d) 12-bit gray scale.
iv) Dewer chamber of superconductive electromagnet in MRI is consist of
a) liquid nitrogen b) liquid helium
c) liquid oxygen d) liquid carbon dioxide.
v) Rochelle Salt is a
a) natural piezoelectric crystal
b) synthetic piezoelectric crystal
c) composite piezoelectric crystal
d) none of these.
vi) In MRI the relaxation time T2 of a tissue is always
a) Greater than T1 b) Less than T1
c) Equal to T1 d) Half of T1.
vii) The crystal used in Gamma Camera head is :
a) Caesium Iodide b) Barium Titanate
c) Sodium Iodide d) Natural Quartz.
viii) Which of the Isotope Imaging scanners are not used anymore i.e. obsolete ?
a) PET scanner b) Gamera Camera
c) Rectilinear scanner d) SPECT.
ix) Nutation phenomena of MRI is a
a) first order motion b) second order motion
c) third order motion d) none of these.
x) Time gain compensation is necessary in which of the following imaging modality ?
a) CT b) MRI
c) PET d) Ultrasound.
GROUP – B : ( Short Answer Type Questions )
Answer any three of the following. 3 × 5 = 15
2. Briefly explain A-Mode, B-Mode and M-Mode in ultrasound imaging.
3. What are the main systems of MRI instrumentation ? Mention the probable uses of MRI in medical field. 2
4. What is real-time imaging ? Describe various scanning systems used in real time imaging. 2 + 3
5. Draw a neat sketch of an ultrasound transducer and explain function of the parts.
6. What is an Isotope ? Explain with a block diagram a Radioisotope Generator commonly used in the Nuclear Medicine Dept. of a hospital. 1 + 4
7. Write an equation for linear attenuation coefficient of an object having thickness ‘x’. Draw Houndsfield scale and indicate CT unmbers for air, water and bone. 2 + 3