| Question 1: Which of the following is not a real factor that will modify the magnitude of the signal received during an MRI imaging series? |
| Reference: | A. Wolbarst and N. Yanasak. An Introduction to MRI Physics for Physicists and Engineers. Medical Physics Publishing, 2019 |
| Choice A: | phase differences develop between transverse bulk magnetization in different voxel locations. |
| Choice B: | transverse magnetization in one voxel decreases dispersion in another voxel. |
| Choice C: | phase dispersion of transverse bulk magnetization increases within each voxel. |
| Choice D: | RF signal leaks into the scan room via the door. |
| Question 2: After a single, isolated excitation of tissue using an MR scanner, T1 relaxation is the sole process by which: |
| Reference: | D. B. Plewes & W. Kucharczyk. Physics of MRI: A Primer. JOURNAL OF MAGNETIC RESONANCE IMAGING 35:1038–1054 (2012) |
| Choice A: | longitudinal magnetization regrows towards its initial equilibrium value due to spin-flip
transitions. |
| Choice B: | transverse magnetization disappears due to phase dispersion within a voxel. |
| Choice C: | a spin echo is formed that can be detected with a receive coil. |
| Choice D: | all bulk magnetization is dispersed during imaging |
| Question 3: Which of the following statements about the difference between spin-echo (SE) and gradient-echo (GE) imaging is not true? |
| Reference: | R. Bitar, G Leung, S. Tadros, et al. MR Pulse Sequences: What Every Radiologist Wants to Know but is Afraid to Ask. 26(2): 513-37 RadioGraphics (2006) |
| Choice A: | SE imaging is generally more immune to susceptibility artifacts than GE. |
| Choice B: | For T1-weighted imaging, GE uses small flip angles and short TR values, whereas SE often
uses an IR pulse. |
| Choice C: | As a general rule, GE imaging results in lower SAR values during a clinical exam than SE
imaging. |
| Choice D: | SE is capable of generating both T2 and T2* weighting in an image, whereas GE can only
generate T2 weighting. |
| Question 4: Which of the following statements about k-space properties is true? |
| Reference: | T. A. Gallagher, A. J. Nemeth, & L. Hacein-Bey. An Introduction to the Fourier Transform: Relationship to MRI. AJR 190: 1396–1405 (2008) |
| Choice A: | Corruption of one or more data in k-space leads to a corresponding corruption of the same number of voxels in an image. |
| Choice B: | Information stored in the periphery of k-space is related to high-resolution details in an image. |
| Choice C: | Image noise is only important if it is located in the periphery of k-space. |
| Choice D: | Information in the center of k-space is relatively unimportant to the integrity of an image. |
| Question 5: Spin-warp imaging is: |
| Reference: | A. Wolbarst and N. Yanasak. An Introduction to MRI Physics for Physicists and Engineers. Chp 12. Medical Physics Publishing, 2019 |
| Choice A: | the fastest procedure by which k-space data can be acquired during an MRI scan. |
| Choice B: | a key component of all gradient echo-type imaging sequences. |
| Choice C: | a method in MRI that describes a particular path in k-space along which data are acquired sequentially. |
| Choice D: | the least demanding technique on the gradient system compared with others such as spiral imaging. |
| Question 6: Which of the following techniques below matches the following description: this fast MRI acquisition technique often acquires an image in a single excitation, relying on filling a little more than one side of k-space to save time. |
| Reference: | A. Wolbarst and N. Yanasak. An Introduction to MRI Physics for Physicists and Engineers. Chp 13. Medical Physics Publishing, 2019 |
| Choice A: | FSE |
| Choice B: | Spoiled GE |
| Choice C: | EPI |
| Choice D: | pMRI |
| Choice E: | compressed sensing |
