Download DNB 2020 December Nuclear MedIcIne Paper I Question Paper

NUCLEAR MEDICINE

PAPER-I

Time: 3 hours NM/D/20/24/1

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Max. Marks: 100

Important Instructions:

• You are provided with 5 answer sheet booklets. Each individual answer sheet booklet consists of 10 pages excluding the covering jackets.
• Answers to all the questions must be attempted within these 5 answer sheet booklets which must be later tagged together at the end of the exam.
• No additional supplementary answer sheet booklet will be provided.

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• Attempt all questions in order.
• Each question carries 10 marks.
• Read the question carefully and answer to the point neatly and legibly.
• Do not leave any blank pages between two answers.
• Indicate the question number correctly for the answer in the margin space.

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• Answer all the parts of a single question together.
• Start the answer to a question on a fresh page or leave adequate space between two answers.
• Draw table/diagrams/flowcharts wherever appropriate.

Write short notes on:

1. Enumerate different personal monitoring devices. Describe the working principle and different parts of a TLD. What is glow curve?

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   3+5+2

2. a) Define and describe with example:

   2+2+2+4

   1. Isomeric transition.

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   2. Internal conversion.
   3. Electron capture.

   b) Describe Bremsstrahlung radiation and factors affecting its production.

3. Describe briefly various challenges of attenuation correction in a PET/MR system and strategies to correct them.

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   5+5

4. Describe briefly filtered back projection and iterative reconstruction with schematics. What is 'time of flight' PET?

   7+3

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5. What are the types of Statistical Errors? Briefly describe sample size calculation for randomized control trial study.

   4+6

6. a) Absorbed dose, equivalent dose and effective dose.

   (2+2+2)+(2+2)

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   b) Radiation weighting factor and tissue weighting factor.

7. Describe interactions of radiation with matter and its application in Nuclear Medicine.

   6+4

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8. Derive decay equation. What are the different types of equilibrium achieved in a mixture of parent and daughter radionuclides?

   5+5

P.T.O.

9. Define the following:

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   2+2+2+2+2

   1. Partial Volume Effect.
   2. Full Width at Half Maximum.
   3. Tenth Value Layer.
   4. Linear Energy Transfer.

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   5. Branching Ratio.

10. Scintillation crystals used in PET system, compare the properties.

    10

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