Saudi Nuclear Medicine Club Quiz #2 @saudi_nmc

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Zeem

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1/10 Questions

3. All of the following positron emission tomography myocardial perfusion tracers are cyclotron produced EXCEPT:
- Water O-15
- Rubidium Rb-82
- Acetate C-11
- Ammonia N-13

About This Quiz

" Quiz #2 " @saudi_nmc
Time: 8mins
10 Questions [ 10 multiple-choice ]
Number of Attempts Allowed: 5
Good Luck :)

Saudi Nuclear Medicine Club " Quiz #2 " @saudi_nmc - Quiz

2.

9. What should have been done to avoid the artifact illustrated in Fig.1 ?
- Administer insulin
- Administer glucose
- Keeping the patient warm during the uptake phase after the FDG injection
- Keeping the patient cool during the uptake phase after the FDG injection
Correct Answer

A. Keeping the patient warm during the uptake phase after the FDG injection

Explanation

Keeping the patient warm during the uptake phase after the FDG injection The MIP image demonstrates intense FDG uptake in brown fat, and excessive metabolism in the neck and paraspinal area. Keeping the patient warm and comfortable prior to injection can reduce such activity.

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3.

2. A PET system capacity to distinguish between two points after image reconstruction is called :-
- Contrast
- Resolution
- Attenuation
- Emission
Correct Answer

A. Resolution

Explanation

PET system resolution, according to NEMA guidelines, is assessed by imaging a point source in the air and reconstructing the images with no smoothing or transformation of images. The resolution of the system is affected by the annihilation ambiguities, the detector ring diameter and the size of the scintillation crystal

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4.

10. When monitoring response to treatment with PET-FDG imaging is essential to obtain:
- Baseline PET-FDG scan
- Interim PET-FDG scan
- PET-FDG scan on the last day of therapy
- PET-FDG scan two days after therapy
Correct Answer

A. Baseline PET-FDG scan

Explanation

Baseline PET-FDG scan To monitor response to therapy and to reduce the risk of false-negative and false-positive readings, it is recommended that a baseline scan be available for assessment

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5.

1. Truncation artifacts in PET/CT imaging are produced by
- Contrast medium
- Difference in size of FOV between PET and the CT
- Patient may drink water but should not eat.
- Difference in scanning time between PET and the CT
Correct Answer

A. Difference in size of FOV between PET and the CT

Explanation

Discrepancy between ﬁelds of view (FOVs) in a PET/CT scanner—70 cm causes a truncation artifact when imaging extends beyond the CT FOV-50 cm; as a result no attenuation correction values for the truncated anatomy are being applied.

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6.

6. What imaging agent can be used to image the skeleton as well as myocardial infarction
- 99mTc MDP
- 99mTc HDP
- 99mTc PYP
- 201TL chloride
Correct Answer

A. 99mTc PYP

Explanation

pyrophosphate can be used for bone scintigraphy, myocardial infarction, and blood pool imaging

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7.

8. The enormous decrease in photons detection efﬁciency by SPECT, when compared to that of PET, is caused by:
- Shorter imaging time
- Lower injected dose
- Use of collimator
- Use of shielding
Correct Answer

A. Use of collimator

Explanation

image resolution is inferior to that of PET because emission of single photon requires the use of a collimator to acquire image data

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8.

4. In general, the best radiopharmaceutical to use for a suspected abdominal abscess is
- 67Ga citrate
- 111In-labeled leukocytes
- 111In satumomab pendetide
- 111In octreotide
Correct Answer

A. 111In-labeled leukocytes

Explanation

It is best to use a radiopharmaceutical with less gastrointestinal excretion; therefore, 67Ga should be excluded. Octreotide is used for tumors with somatostatin receptors, and satumomab pendetide is a monoclonal antibody used mainly for colorectal and ovarian cancers, so these are not helpful. 111In-labeled leukocytes would be useful; GI activity will not be present when disease is absent.

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9.

5. In a patient with renal artery stenosis
- A post captopril study will show increased GFR
- A post captopril study will show decreased GFR
- A post captopril study will show GFR to be unchanged
Correct Answer

A. A post captopril study will show decreased GFR

Explanation

Patients who have renal artery stenosis, when given an ACE (angiotensin-converting enzyme) inhibitor, will show a decrease in GFR. Therefore, captopril renography is an effective examination to determine whether renal artery stenosis is the cause of hypertension

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10.

7. the dose calibrator quality control procedure performed with different sealed radionuclides is called:
- Geometry
- Accuracy
- Linearity
- Constancy
Correct Answer

A. Accuracy

Explanation

A ccuracy testing is performed at installation and then annually, with at least two different sealed sources, e.g., Co-57, Cs-137, and Ba-133

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May 07, 2020

Quiz Created by
Zeem

Saudi Nuclear Medicine Club " Quiz #2 " @saudi_nmc

3. All of the following positron emission tomography myocardial perfusion tracers are cyclotron produced EXCEPT:

Quiz Preview

9. What should have been done to avoid the artifact illustrated in Fig.1 ?

2. A PET system capacity to distinguish between two points after image reconstruction is called :-

10. When monitoring response to treatment with PET-FDG imaging is essential to obtain:

1. Truncation artifacts in PET/CT imaging are produced by

6. What imaging agent can be used to image the skeleton as well as myocardial infarction

8. The enormous decrease in photons detection efﬁciency by SPECT, when compared to that of PET, is caused by:

4. In general, the best radiopharmaceutical to use for a suspected abdominal abscess is

5. In a patient with renal artery stenosis

7. the dose calibrator quality control procedure performed with different sealed radionuclides is called: