Saudi Nuclear Medicine Club " Quiz #3 " @saudi_nmc

1. 1. If the biological half-life of an isotope is 6 hours, and the physical half-life is 12 hrs, what is the effective half-life?

6 hrs

12 hrs

2 hrs

4 hrs

If a radioactive compound with radioactive half-life (t1/2) is cleared from the body with a biological half-life tb, the effective half-life (te) is given by the expression:

Explanation

If a radioactive compound with radioactive half-life (t1/2) is cleared from the body with a biological half-life tb, the effective half-life (te) is given by the expression:

2. 9. Hodgkin's disease is a type of:

Lung cancer

Lymphoma

AIDS

Lupus

Explanation

3. 10. Concerning the Pulse Height Spectrum from ¹³⁷Cs shown above . Which one of the following is the Photopeak

A

B

C

D

E

Based on the information given in the question, it is implied that there is a pulse height spectrum from 137Cs shown above. The question asks which one of the options (A, B, C, D, E) represents the Photopeak. Without any further context or information about the pulse height spectrum or 137Cs, it is not possible to determine the correct answer.

Explanation

Based on the information given in the question, it is implied that there is a pulse height spectrum from 137Cs shown above. The question asks which one of the options (A, B, C, D, E) represents the Photopeak. Without any further context or information about the pulse height spectrum or 137Cs, it is not possible to determine the correct answer.

4. 2. How does 201Tl decay?

By positron emission

By electron capture

By beta emission

none of the above

Explanation

5. 7. Which of the following is excreted by Glomerular Filtration?

99mTc-DTPA

99mTc-DMSA

99mTc-MAG3

99mTc-GH

Explanation

6. 5. Concerning the equilibrium type for 99Mo decaying to 99mTc in a generator. Which one of the following is True

Secular Equilibrium

Transient Equilibrium

No Equilibrium

Secondary Equilibrium

Infinite Equilibrium

Transient equilibrium is a situation in which equilibrium is reached by a parent-daughter radioactive isotope pair where the half-life of the daughter is shorter than the half-life of the parent.

Explanation

Transient equilibrium is a situation in which equilibrium is reached by a parent-daughter radioactive isotope pair where the half-life of the daughter is shorter than the half-life of the parent.

7. 4. All the following are true about Rubidiem-82 EXCEPT?

It produced from strontium-82/Rb-82 generator

It decays 95% by electron capture and 5% by positron emission

The relative myocardial extraction and localization of Rb-82 are proportional to blood flow

It is taken up into the myocardium by active transport

It decays 95% by positron emission and 5% by electron capture

Explanation

It decays 95% by positron emission and 5% by electron capture

8. 8. All the following are myocardial PET Tracers EXCEPT

Nitrogen-13 Ammonia

Fluorine-18-fluorocholine

Carbon-11

Fluorine-18 Fluorodeoxyglucose

Perfusion AGENT :N-13 R82 O15
Fatty Acid Metabolism: Carbon-11
Glucose Metabolism: Fluorine-18 Fluorodeoxyglucose
18F-fluorocholine PET/CT in imaging of parathyroid adenoma.

Explanation

Perfusion AGENT :N-13 R82 O15
Fatty Acid Metabolism: Carbon-11
Glucose Metabolism: Fluorine-18 Fluorodeoxyglucose
18F-fluorocholine PET/CT in imaging of parathyroid adenoma.

9. 6. Generators are used to produce radionuclides. Which one of the following is not produced from a radionuclide generator?

99mTc

82Rb

68Ga

81mKr

67Ga

Explanation

10. 3.A perfusion lung scan is being quantified. If counts obtained from an ROI around the left lung are 142,857 and the counts within the ROI about the right lung are 195,246 ,what percentage of perfusion is directed to the right lung?

28%

42%

58%

65%

73%

shunt= total count – lung count / total count *100
338.103-195.246/338.103 *100=42%

Explanation

shunt= total count – lung count / total count *100
338.103-195.246/338.103 *100=42%