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Ich 2103: Medical Physics Ii Question Paper

Ich 2103: Medical Physics Ii

Course:Bachelor Of Science In Community Health

Institution: Jomo Kenyatta University Of Agriculture And Technology question papers

Exam Year:2012

JOMO KENYATTA UNIVERSITY
OF
AGRICULTURE AND TECHNOLOGY

University Examinations 2012/2013

END OF SEMESTER EXAMINATION FOR THE DEGREE IN BACHELOR OF SCIENCE IN COMMUNITY HEALTH

ICH 2103: MEDICAL PHYSICS II

DATE: AUGUST 2012 TIME: 2 HOURS

INSTRUCTIONS: ANSWER QUESTION ONE AND ANY OTHER TWO
QUESTIONS
____________________________________________________________________________

QUESTION ONE
(a) Explain the properties of x-rays that make them useful in medicine.
(3 mks)

(b) Explain application of x-rays in research. (3 mks)

(c) Too much exposure to x-rays causes mutation. Explain. (3 mks)

(d) Distinguish x-rays from ultrasound (3 mks)

(e) Identify the benefits of ultrasound scanning as compared to x-ray scanning. (3 mks)

(f) Identify any three sources of natural radiation. (3 mks)

(g) Explain the result of radiation protection if not taken in radiation facilities. (3 mks)

(h) Explain briefly one way by which radiations are measured. (3 mks)

(i) Advice as to why expectant mothers should not expose themselves too x-rays. (3 mks)

(j) Explain why radioactivity must be studied by health officers. (3 mks)

SECTION B
QUESTION TWO
(a) Use of x-rays to treat cancer is a better option than surgery. Explain.
(3 mks)

(b) Describe the benefits of x-rays in medicine. (4 mks)

(c) Distinguish had from soft x-rays (3 mks)

(d) With the aid of a diagram explain how x-rays are produced. (10 mks)

QUESTION THREE
(a) Explain the disadvantages of ultrasound. (4 mks)

(b) Advice with explanation whether a patient with cancer should use ultra sound or x-rays in treatment. (3 mks)

(c) Apart form taking images of inner body parts and organs, explain other medical applications of ultrasound (3 mks)

(d) With aid of a diagram, describe the formation of image of a foestus on computer screen using ultrasound. (10 mks)

QUESTION FOUR
(a) A radioactive element undergoes alpha decay. Explain what happens to its atomic number and mass number. (3 mks)

(b) Differentiate transition from ionization as applied to electrons in atoms giving an example for each. (3 mks)

(c) Discuss how radionucleids gets into the body. (6 mks)

(d) Explain the three radiation protection principles. (8 mks)

Ich 2103: Medical Physics Ii Question Paper

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