M.Sc. DEGREE EXAMINATION, NOVEMBER 2017
Third Semester
Physics
Elective MEDICAL PHYSICS
(CBCS 2014 onwards)
Time 3 Hours Maximum 75 Marks
Part A (10 x 2 20)
Answer all questions.
1. List the functions of the breathing mechanism.
2. What is paradoxical sleep REM sleep?
3. What is the typical fundamental frequency of the vocal
folds of men and women? What is the lowest frequency
that can be produced by a bass singer and the highest
frequency that a soprano can produce?
4. Name the two common causes of reduced hearing.
5. What is the difference between a conventional electron
microscope and a scanning electron microscope?
6. State the three principal instruments used to examine
the eye and what they measure?
7. Differentiate conventional radiography and
Xeroradiography.
8. Define rad and gray. How is rad related to roentgen?
Sub. Code
4MPH3E2
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9. What is phonocardiography?
10. State the advantage of silver silver chloride electrodes
for ECG monitoring.
Part B x 5 25)
Answer all questions, choosing either or
11. Describe the physics of the Alveoli.
Or
Differentiate Magnetocardiogram and
Magnetoencephalogram.
12. Discuss the physiological effects of Ultrasound in
theraphy.
Or
Describe about the middle ear with neat sketch.
13. How Lasers are used in medicine?
Or
Discuss about the several tests for visual
activity.
What is the amount of light transmitted by a
film of optical density 0.5.
14. Describe a simple method of measuring the
attenuation of an X ray beam.
Or
Explain the short distance radiotherapy or
brachytherapy using beta particles.
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15. Describe the measurement of blood pressure using a
sphygmomanometer.
Or
How can you obtain an accurate ECG using metal
electrodes?
Part C x 10 30)
Answer any three questions.
16. Describe the functioning and the study of electrical
signals from the heart using electro cardiogram.
17. Explain with neat schematic sketch how will you obtain
diagnostic informations about the depth of structures in
the body using Ultrasonic A scan method and Ultrasonic
B scan method.
18. Describe in detail the defective vision and its correction
with few examples.
19. How a modern X ray image is produced? Discuss the
factors that influence the quality of the image.
20. Describe in detail
Major components of the cardiovascular system.
Laminar and turbulent blood flow.
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