Radionuclide Imaging Multiple Choice Questions
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Question 1 of 30
1. Question
Concerning radionuclides and isotopes:
(a) Isotopes of an element have the same mass number, but different atomic number
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Question 2 of 30
2. Question
Concerning radionuclides and isotopes:
(b) Unstable nuclei are radioactive
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Question 3 of 30
3. Question
Concerning radionuclides and isotopes:
(c) Radionuclides can be produced by generators containing a radioactive parent
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Question 4 of 30
4. Question
Concerning radionuclides and isotopes:
(d) Radionuclides always contain unequal number of protons and neutrons
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Question 5 of 30
5. Question
Concerning radionuclides and isotopes:
(e) If protons exceed neutrons in the nucleus, radionuclides may undergo beta minus decay
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Question 6 of 30
6. Question
Planar imaging spatial resolution is affected by:
(a) The distance between the patient and the collimator face
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Question 7 of 30
7. Question
Planar imaging spatial resolution is affected by:
(b) The number of holes in the collimator
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Question 8 of 30
8. Question
Planar imaging spatial resolution is affected by:
(c) The diameter of the holes in the collimator
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Question 9 of 30
9. Question
Planar imaging spatial resolution is affected by:
(d) The length of the holes in the collimator
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Question 10 of 30
10. Question
Planar imaging spatial resolution is affected by:
(e) The thickness of the crystal
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Question 11 of 30
11. Question
SPECT images
(a) can have their noise reduced by increasing the slice thickness
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Question 12 of 30
12. Question
SPECT images
(b) are obtained from detection of gamma rays released from the annihilation of positrons.
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Question 13 of 30
13. Question
SPECT images
(c) of the brain are acquired using an elliptical orbit of the gamma camera detectors
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Question 14 of 30
14. Question
SPECT images
(d) have better spatial resolution than PET images
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Question 15 of 30
15. Question
SPECT images
(e) are acquired using a pixel size < half the expected resolution
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Question 16 of 30
16. Question
PET detectors
(a) can be solid scintillation detectors
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Question 17 of 30
17. Question
PET detectors
(b) utilise NaI (TI) crystals
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Question 18 of 30
18. Question
PET detectors
(c) should have a long scintillation decay times
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Question 19 of 30
19. Question
PET detectors
(d) rotate around the patient whilst detecting gamma photons emitted from the patient
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Question 20 of 30
20. Question
PET detectors
(e) can be crystal blocks attached to the PMTs
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Question 21 of 30
21. Question
Concerning PET Acquisitions
(a) Only scattered events contribute to image noise
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Question 22 of 30
22. Question
Concerning PET Acquisitions
(b) Only random events increase with patient size
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Question 23 of 30
23. Question
Concerning PET Acquisitions
(c) About 90% of photons detected are single events
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Question 24 of 30
24. Question
Concerning PET Acquisitions
(d) Differences in detection timings of coincident events is used to improve spatial localisation of annihilation events
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Question 25 of 30
25. Question
Concerning PET Acquisitions
(e) A CT scan is performed between each PET field of view bed position
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Question 26 of 30
26. Question
Concerning image reconstruction
(a) Iterative reconstruction techniques use an initial estimate of the radionuclide distribution and iterates towards a more accurate image representation
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Question 27 of 30
27. Question
Concerning image reconstruction
(b) Filtered back projection technique avoids streak artefacts in the final images
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Question 28 of 30
28. Question
Concerning image reconstruction
(c) Filtered back projection is computationally more complex and takes longer than iterative reconstruction
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Question 29 of 30
29. Question
Concerning image reconstruction
(d) A CT scan must be of diagnostic quality for it to accurately correct reconstructed images for attenuation of detected gamma photons
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Question 30 of 30
30. Question
Concerning image reconstruction
(e) The partial volume effect results in underestimation of activity concentration of regions of high focal uptake
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