MRI Multiple Choice Questions
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Question 1 of 55
1. Question
Increasing an MRI system’s magnetic field strength
(a) decreases the net polarisation of magnetisation
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Question 2 of 55
2. Question
Increasing an MRI system’s magnetic field strength
(b) increases the frequency of magnetisation precession
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Question 3 of 55
3. Question
Increasing an MRI system’s magnetic field strength
(c) increases the magnetic field inhomogeneity
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Question 4 of 55
4. Question
Increasing an MRI system’s magnetic field strength
(d) decreases the energy deposited in the patient
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Question 5 of 55
5. Question
Increasing an MRI system’s magnetic field strength
(e) decreases the relaxation rate T2*
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Question 6 of 55
6. Question
Concerning diffusion-weighted imaging (DWI):
(a) Lower b-values impart a higher diffusion weighting to the image
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Question 7 of 55
7. Question
Concerning diffusion-weighted imaging (DWI):
(b) Echo Planar Imaging (EPI) readouts are typically used
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Question 8 of 55
8. Question
Concerning diffusion-weighted imaging (DWI):
(c) The apparent diffusion coefficient has units of mm2/s
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Question 9 of 55
9. Question
Concerning diffusion-weighted imaging (DWI):
(d) Increasing the strength of diffusion weighting gradients increases the b value
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Question 10 of 55
10. Question
Concerning diffusion-weighted imaging (DWI):
(e) The amount of diffusion attenuation measured is independent of applied gradient direction for all tissues
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Question 11 of 55
11. Question
Inversion pulses:
(a) rotate magnetisation by 90°
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Question 12 of 55
12. Question
Inversion pulses:
(b) cannot be used to impart T2 weighting to an image
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Question 13 of 55
13. Question
Inversion pulses:
(c) can be used to null fat signal when used in conjunction with a long inversion time
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Question 14 of 55
14. Question
Inversion pulses:
(d) can be used to impart T1 weighting to an image
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Question 15 of 55
15. Question
Inversion pulses:
(e) can be used to null CSF signal when used in conjunction with a long inversion time
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Question 16 of 55
16. Question
Concerning the Turbo Spin Echo
(a) Increased turbo factor leads to shorter scan duration
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Question 17 of 55
17. Question
Concerning the Turbo Spin Echo
(b) Increased turbo factor leads to blurring in tissue with short T1
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Question 18 of 55
18. Question
Concerning the Turbo Spin Echo
(c) TSE is only compatible with multi-slice 2D imaging
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Question 19 of 55
19. Question
Concerning the Turbo Spin Echo
(d) TSE can utilise refocussing pulses with flip angles below 180°
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Question 20 of 55
20. Question
Concerning the Turbo Spin Echo
(e) Single-shot TSE is robust to patient motion
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Question 21 of 55
21. Question
Parallel imaging
(a) is used to increase scan duration
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Question 22 of 55
22. Question
Parallel imaging
(b) requires receive coils with multiple receive channels
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Question 23 of 55
23. Question
Parallel imaging
(c) results in a loss in SNR
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Question 24 of 55
24. Question
Parallel imaging
(d) allows k-space to be undersampled in the frequency-encode direction
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Question 25 of 55
25. Question
Parallel imaging
(e) cannot be used to increase the temporal resolution of dynamic contrast-enhanced studies
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Question 26 of 55
26. Question
Considering gradient echo sequences:
(a) A spoiled gradient echo image with a long echo time (TE) will be T2*-weighted.
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Question 27 of 55
27. Question
Considering gradient echo sequences:
(b) A spoiled gradient echo image with a short echo time (TE) and low flip angle will be T1-weighted.
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Question 28 of 55
28. Question
Considering gradient echo sequences:
(c) The echo time (TE) of a spoiled gradient echo sequence can be used to control whether the signals from fat and water are in-phase or out-of-phase.
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Question 29 of 55
29. Question
Considering gradient echo sequences:
(d) Gradient echo sequences are too slow to use in breath-hold acquisitions in abdominal imaging.
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Question 30 of 55
30. Question
Considering gradient echo sequences:
(e) Gradient echo sequences are better than spin echo sequences for reducing the image artefact around metal implants
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Question 31 of 55
31. Question
Considering inversion recovery sequences:
(a) An inversion recovery sequence with a relatively short inversion time (TI ~ 150-240 ms) can be used to suppress the signal from fat.
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Question 32 of 55
32. Question
Considering inversion recovery sequences:
(b) The inversion time (TI) required to suppress the signal from fat depends on the strength of the main magnetic field (B0).
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Question 33 of 55
33. Question
Considering inversion recovery sequences:
(c) Inversion recovery sequences can be used to suppress the signal from fluid.
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Question 34 of 55
34. Question
Considering inversion recovery sequences:
(d) Inversion recovery sequences can be used to suppress the signal from any tissue by choosing the appropriate inversion time (TI).
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Question 35 of 55
35. Question
Considering inversion recovery sequences:
(e) Inversion recovery sequences are often used in contrast-enhanced MRI (i.e. after injection of a gadolinium-based contrast agent).
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Question 36 of 55
36. Question
Considering spin-echo (SE) sequences:
(a) A SE image with a long echo time (TE) and long repetition time (TR) will be proton-density-weighted (PDw).
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Question 37 of 55
37. Question
Considering spin-echo (SE) sequences:
(b) A SE image with short echo time (TE) and long repetition time (TR) will be T2-weighted.
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Question 38 of 55
38. Question
Considering spin-echo (SE) sequences:
(c) A SE image with short echo time (TE) and long repetition time (TR) will be T1-weighted.
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Question 39 of 55
39. Question
Considering spin-echo (SE) sequences:
(d) Materials with long T1 appear bright on T1-weighted images.
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Question 40 of 55
40. Question
Considering spin-echo (SE) sequences:
(e) Materials with long T2 appear bright on T2-weighted images.
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Question 41 of 55
41. Question
Considering a material that appears bright on a heavily diffusion-weighted image:
(a) You can infer that the material must have a low apparent diffusion coefficient (ADC) because it appears bright on a heavily diffusion-weighted image.
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Question 42 of 55
42. Question
Considering a material that appears bright on a heavily diffusion-weighted image:
(b) You can infer that the material must have a high apparent diffusion coefficient (ADC) because it appears bright on a heavily diffusion-weighted image.
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Question 43 of 55
43. Question
Considering a material that appears bright on a heavily diffusion-weighted image:
(c) The bright appearance on the heavily diffusion-weighted image could be due to a low apparent diffusion coefficient (ADC) or long T2 or both of these properties.
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Question 44 of 55
44. Question
Considering a material that appears bright on a heavily diffusion-weighted image:
(d) Inspection of all of the diffusion-weighted images and the apparent diffusion coefficient (ADC) maps is required to correctly interpret the data.
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Question 45 of 55
45. Question
Considering a material that appears bright on a heavily diffusion-weighted image:
(e) A b-value of 100 s/mm2 would generally provide a heavily diffusion-weighted image.
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Question 46 of 55
46. Question
With reference to MR safety:
(a) All medical implants can be scanned in MRI but only using a 1.5T scanner.
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Question 47 of 55
47. Question
With reference to MR safety:
(b) Implants containing metal can never be scanned using a 3T scanner.
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Question 48 of 55
48. Question
With reference to MR safety:
(c) Contact burns may occur if the patient’s skin is touching metal items, electrical cables, or other parts of their skin during scanning.
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Question 49 of 55
49. Question
With reference to MR safety:
(d) It may be necessary to modify imaging protocols in order to meet the conditions specified by the implant manufacturer for scanning a patient with an MR Conditional implant.
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Question 50 of 55
50. Question
With reference to MR safety:
(e) Identifying a medical device has been labelled as MR Conditional is sufficient to ensure MR safety on a 1.5T MRI scanner.
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Question 51 of 55
51. Question
Considering fat suppression:
(a) Fat suppression is always applied in all MR images.
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Question 52 of 55
52. Question
Considering fat suppression:
(b) Inversion recovery-based fat suppression (e.g. STIR) suppresses fat by exploiting the difference in T1 relaxation times between fat and other tissues.
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Question 53 of 55
53. Question
Considering fat suppression:
(c) Frequency-selective fat suppression methods (e.g. Chemical Shift Selective [CHESS], FatSat) suppress fat by exploiting the difference in resonant frequencies between protons in water molecules and protons in fat molecules.
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Question 54 of 55
54. Question
Considering fat suppression:
(d) Frequency-selective fat suppression methods (e.g. CHESS, FatSat) are more likely to fail near metal implants compared with inversion recovery-based fat suppression.
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Question 55 of 55
55. Question
Considering fat suppression:
(e) Dixon MRI sequences can be used to generate fat suppressed images
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